HALL, Circuit Judge:

This appeal presents the narrow question of whether the district court's intentional closure of the courtroom during voir dire violated Defendant-Appellant Raghubir K. Gupta's right to a public trial. In Waller v. Georgia, 467 U.S. 39, 48, 104 S.Ct. 2210, 81 L.Ed.2d 31 (1984), the Supreme Court held that, consistent with the Sixth Amendment, a trial court may exclude the public from the courtroom only upon satisfaction of a four-factor test, and in Presley v. Georgia, 558 U.S. 209, 130 S.Ct. 721, 724, 175 L.Ed.2d 675 (2010), the Supreme Court reiterated that this test applies to closures during voir dire. Because the lower court here did not analyze the Waller factors prior to closing the courtroom, the closure was unjustified. In prior decisions of this Court, we have suggested that an unjustified closure, under certain and limited circumstances, may not require reversal of the defendant's conviction. See, e.g., Gibbons v. Savage, 555 F.3d 112, 120 (2d Cir.2009) ("[I]t does not follow that every temporary instance of unjustified exclusion of the public — no matter how brief or trivial, and no matter how inconsequential the proceedings that occurred during an unjustified closure — would require that a conviction be overturned."); Peterson v. Williams, 85 F.3d 39, 42 (2d Cir.1996) (applying the same rule). Whatever the outer boundaries of this doctrine may be, however, they do not encompass the present case. Here, the district court's intentional, unjustified exclusion of the public for the entirety of voir dire was neither brief nor trivial, and thus violated Gupta's Sixth Amendment right to a public trial. We therefore VACATE his conviction and REMAND for further proceedings not inconsistent with this opinion.

BACKGROUND

I. Voir Dire

Jury selection for Gupta's trial commenced at approximately 10:00 a.m. on March 24, 2008. The district court began by distributing a written two-part questionnaire to the venire. Before addressing the questionnaire, the court briefly explained to the venire members the importance of jury duty, the nature and expected length of the trial, and the jury selection process. The court then read aloud the approximately 75 written questions in part one of the questionnaire, instructing the venire members to "follow along" and "jot down or note" on the questionnaire any question to which their answer was "yes." Following the reading of the questions, the court announced a short recess, after which the courtroom deputy filled the jury box and the first few rows of the courtroom with 32 qualified prospective jurors. During this process, the courtroom deputy announced the name of each prospective juror. If an individual juror had answered "yes" to any of the questions in part one of the questionnaire, he or she was questioned further by the court at sidebar; and, if the juror answered "no" to all of the questions, he or she was directed to take a seat. The process took the remainder of the morning. In total, the court questioned 43 prospective jurors at sidebar without objection from Gupta. Eleven were dismissed for cause, all on consent of both parties.

After the 32 qualified prospective jurors were selected, the court excused most of the remaining venire members, leaving a few as possible alternates. The court adjourned for lunch, and when voir dire resumed at 2:15 p.m., the court asked each prospective juror, in open court, a series of basic questions about his or her background and interests. These questions included questions about, inter alia, the juror's residence, employment, level of education, reading interests, and favorite television shows. Neither party requested any additional questions, and none of the prospective jurors was removed during this phase. With questioning complete, the court dismissed the three remaining alternates, who had been present throughout this process. Thereafter, counsel for both parties adjourned to the jury room to exercise their peremptory challenges; neither party raised any objection to the other party's challenges. Upon returning to the courtroom, the deputy impaneled the jury and swore in its members, after which the remaining venire members were dismissed. Although it is not clear from the record at what time voir dire ended, there was sufficient time left in the afternoon for the court to give preliminary instructions to the jury, for both parties to give their opening statements, and for the court and counsel to have an extended colloquy after the jury had been dismissed. No party raised any contemporaneous objections to anything that occurred during voir dire.

II. First Appeal and Remand

The jury returned a guilty verdict in April 2008. Gupta was sentenced by the district court in October 2009, after which he appealed. In January 2010 (while his appeal was pending before this Court), Gupta submitted a letter to this Court in which he alleged for the first time that the district court had violated his Sixth Amendment right by closing the courtroom during voir dire. Relying on the Supreme Court's then-recent decision in Presley, Gupta later moved to remand for supplemental fact-finding, and in April 2010, we granted his motion.

On remand, Gupta moved for a new trial, again asserting that the exclusion of the public during voir dire violated his right to a public trial. In an affirmation attached to the motion, Gupta's trial counsel declared:

Joint Appendix on Rehearing En Banc ("J.A.") at 228. Gupta attached to the affirmation affidavits from Sudhir Gupta and Maria Young, both of whom affirmed that on the first day of trial, they were asked to leave the courtroom prior to the start of voir dire and did not reenter the room until after the jury had been selected. In lieu of an evidentiary hearing, the district court adopted as its factual findings an affidavit submitted by William Delaney, a courtroom deputy, who affirmed that on the day in question, "[s]eventy (70) jurors were ordered and sent to the courtroom for jury selection," and:

J.A. at 238-39. After the district court made its findings, jurisdiction was restored to us pursuant to the procedures set forth in United States v. Jacobson, 15 F.3d 19, 22 (2d Cir.1994).

DISCUSSION

A defendant's right to a public trial is guaranteed by the Sixth Amendment. See Waller, 467 U.S. at 45-47, 104 S.Ct. 2210; see also Presley, 130 S.Ct. at 723 (noting that, while this right derives from both the First and Sixth Amendments, it is the latter that supports a defendant's public trial right); cf. Gannett Co. v. DePasquale, 443 U.S. 368, 380, 99 S.Ct. 2898, 61 L.Ed.2d 608 (1979) ("Our cases have uniformly recognized the public trial guarantee as one created for the benefit of the defendant."). "The knowledge that every criminal trial is subject to contemporaneous review in the forum of public opinion is an effective restraint on possible abuse of judicial power." In re Oliver, 333 U.S. 257, 270, 68 S.Ct. 499, 92 L.Ed. 682 (1948); accord DePasquale, 443 U.S. at 412, 99 S.Ct. 2898 (Blackmun, J., concurring in part and dissenting in part) ("The public trial is rooted in the `principle that justice cannot survive behind walls of silence[.]'" (quoting Sheppard v. Maxwell, 384 U.S. 333, 349, 86 S.Ct. 1507, 16 L.Ed.2d 600 (1966))); Cox Broad. Corp. v. Cohn, 420 U.S. 469, 492, 95 S.Ct. 1029, 43 L.Ed.2d 328 (1975) (holding that publicity "serves to guarantee the fairness of trials and to bring to bear the beneficial effects of public scrutiny upon the administration of justice"). The public trial right unquestionably extends to voir dire. See Presley, 130 S.Ct. at 724; accord Gibbons, 555 F.3d at 115 ("The defendant has a right to an open, public trial, including during the jury selection.").

The public trial guarantee is not absolute, however. "[It] may give way in certain cases to other rights or interests, such as the defendant's right to a fair trial or the government's interest in inhibiting disclosure of sensitive information. Such circumstances will be rare, however, and the balance of interests must be struck with special care." Waller, 467 U.S. at 45, 104 S.Ct. 2210. To overcome the guarantee's "presumption of openness," Press-Enter. Co. v. Super. Ct. of Cal., 464 U.S. 501, 510, 104 S.Ct. 819, 78 L.Ed.2d 629 (1984) (internal quotation marks omitted), trial courts must — "before excluding the public from any stage of a criminal trial," Presley, 130 S.Ct. at 724 (emphasis added) — satisfy themselves that the following four criteria have been met: (1) "the party seeking to close the [proceeding] must advance an overriding interest that is likely to be prejudiced"; (2) "the closure must be no broader than necessary to protect that interest"; (3) "the trial court must consider reasonable alternatives to closing the proceeding"; and (4) the trial court "must make findings adequate to support the closure," Waller, 467 U.S. at 48, 104 S.Ct. 2210; accord Gibbons, 555 F.3d at 116; Ayala v. Speckard, 131 F.3d 62, 69 (2d Cir.1997) (in banc). In other words, if a court intends to exclude the public from a criminal proceeding, it must first analyze the Waller factors and make specific findings with regard to those factors. If a trial court fails to adhere to this procedure, any intentional closure is unjustified and will, in all but the rarest of cases, require reversal. E.g., Presley, 130 S.Ct. at 725.

Here, despite not making any Waller findings, the district court intentionally excluded the public from the courtroom for the entirety of voir dire. On these facts alone, the closure was unjustified. See Waller, 467 U.S. at 48, 104 S.Ct. 2210 (the trial court "must make findings adequate to support [a] closure"). Nevertheless, even if we accept Delaney's affidavit as illustrative of the district court's Waller findings (and for the reasons already discussed, such an approach is untenable because the court made no explicit findings before closing the courtroom), the reasons identified therein are insufficient to justify the closure. Delaney affirmed that, at the court's direction, he excluded Gupta's brother and girlfriend from the courtroom during voir dire because of "the large number of jurors in the venire panel" and the need "to protect the panel from hearing anything about the case from any member of the public present." See J.A. at 238-39. As we have previously held, such justifications are inadequate — a point the Government has conceded. See Original Appellee Br. at 25 & 25 n.* ("[T]he District Court's exclusion of members of the public from the courtroom during voir dire violated the four-factor Waller test."); Gibbons, 555 F.3d at 117 (holding that, under Waller, insufficient space because of the size of the venire and the risk of tainting the jury pool are not "compelling reasons" for closure).

Because the closure here was unjustified, the presumptive result under Waller is vacatur of the conviction. See, e.g., Presley, 130 S.Ct. at 725 (reversing and remanding because the trial court failed to comply with Waller before closing the courtroom). The Government argues, however, that under our so-called "triviality standard," we should affirm Gupta's conviction, notwithstanding the unjustified closure, because the exclusion of the public in this case was trivial and thus did not violate Gupta's Sixth Amendment public trial right.

Applying that standard in the past, we have reasoned that certain errors are "not significant enough to rise to the level of a constitutional violation." Carson v. Fischer, 421 F.3d 83, 94 (2d Cir.2005); see Gibbons, 555 F.3d at 120 ("[Not] every temporary instance of unjustified exclusion of the public — no matter how brief or trivial, and no matter how inconsequential the proceedings that occurred during an unjustified closure — [] require[s] that a conviction be overturned."). As we explained in first articulating a "triviality standard," it

Peterson, 85 F.3d at 42. A number of our sister circuits have adopted this same reasoning. See, e.g., United States v. Perry, 479 F.3d 885, 890 (D.C.Cir.2007) (applying Peterson's "triviality standard"); United States v. Ivester, 316 F.3d 955, 959-60 (9th Cir.2003) (applying the "widely-accepted Peterson test"); Braun v. Powell, 227 F.3d 908, 918-19 (7th Cir.2000) (adopting Peterson's "triviality standard"); see also United States v. Greene, 431 Fed.Appx. 191, 195 (3d Cir.2011) (holding that Peterson's "triviality analysis" remains valid after Presley).

We have repeatedly emphasized, however, the doctrine's narrow application. See Carson, 421 F.3d at 94 (applying the triviality standard to an unjustified courtroom closure in light of the "rare circumstances" presented in that case). For example, we have invoked the "triviality standard" where a trial court closed the courtroom to the public during a few hours of a multi-day voir dire proceeding, see Gibbons, 555 F.3d at 114-15, 121; where a trial court excluded the defendant's former mother-in-law from the courtroom during the testimony of a state informant, which was later summarized during the prosecution's closing arguments, but allowed other family members to remain, see Carson, 421 F.3d at 86-87, 92-94; and where courtroom officers inadvertently kept a courtroom closed following the testimony of an undercover officer, thereby preventing members of the public from directly observing the defendant's brief testimony, which was later summarized in open court during closing arguments, see Peterson, 85 F.3d at 41-44.1 Conversely, we have declined to apply the standard where a trial court excluded the defendant's siblings from the courtroom during the testimony of an undercover agent who provided the bulk of the evidence upon which the defendant was convicted. See Smith v. Hollins, 448 F.3d 533, 535-37, 540-41 (2d Cir.2006).

The Government urges that, in light of these decisions, the courtroom closure here falls within the category of "trivial" closures that we have previously identified. We disagree. Whatever the outer boundaries of our "triviality standard" may be (and we see no reason to define these boundaries in the present context), a trial court's intentional, unjustified closure of a courtroom during the entirety of voir dire cannot be deemed "trivial."

Much of the Government's argument rests on its observation that the voir dire proceedings here failed to produce any contentious issues. We do not necessarily disagree. Most voir dire proceedings are uncontroversial. But the public trial right is not implicated solely in discordant situations. Rather, "the value of openness" that a public trial guarantees "lies in the fact that people not actually attending trials can have confidence that standards of fairness are being observed; the sure knowledge that anyone is free to attend gives assurance that established procedures are being followed and that deviations will become known." Press-Enter., 464 U.S. at 508, 104 S.Ct. 819. Thus, the regularity of the proceedings is an important impression with which the courts should leave observers. While a public presence will more likely bring to light any errors that do occur, it is the openness of the proceeding itself, regardless of what actually transpires, that imparts "the appearance of fairness so essential to public confidence in the system" as a whole. Id.

Given the exceptional importance of the right to a public trial, excluding the public for all of voir dire without justification grounded in the record, see Presley, 130 S.Ct. at 724; Waller, 467 U.S. at 48, 104 S.Ct. 2210, is not trivial. Indeed, to conclude otherwise would eviscerate the right entirely. Absent the triviality exception, reversal is required here because the district court failed to make Waller findings before excluding the public from the courtroom.

* * *

As a final matter, the Government maintains, notwithstanding the above, that we should deem Gupta's Sixth Amendment challenge forfeited because Gupta did not object contemporaneously to the exclusion of the public during voir dire.

The Government bases its argument on the theory that Gupta learned of the district court's exclusion of his brother and girlfriend prior to the close of voir dire, and, for this reason, Gupta had an obligation either to object to the exclusion himself or to inform his counsel of this fact. Although the record is at best undeveloped on this point, the parties do agree that Gupta's trial counsel was unaware of the closure at the time it occurred. The Government would have us conclude that, because Gupta has not affirmatively demonstrated that he did not know of the closure, we should assume that he had such knowledge and therefore hold him accountable. We decline this invitation. Nothing apart from the Government's speculation supports the conclusion that Gupta was aware of the closure when it happened and thus had the ability to raise a contemporaneous objection. Even if we assume that Gupta had such knowledge, however (and there is no record evidence supporting this assumption), we are loath to impute to a defendant — at least in the circumstances here — an obligation to raise a legal objection as to which his own defense counsel is ignorant during the throes of trial. Cf. United States v. Tramunti, 500 F.2d 1334, 1341 n. 3 (2d Cir.1974) ("Defense counsel cannot fairly be penalized for failure to raise at trial an issue of which he was, without his own fault, ignorant."). We therefore reject the Government's argument that Gupta has forfeited his Sixth Amendment claim.2

CONCLUSION

As should be clear from the above, the importance of the public trial right dictates that, before closing a courtroom to the public, a trial court must inform the parties of its intentions and make explicit Waller findings. Failure to comply with this procedure will, in nearly all cases, invite reversal. While we do not rule out the possibility that in the rare circumstance an unjustified closure may, under our "triviality standard," not require reversal of the defendant's conviction, this is not the present case. Here, the district court's intentional, unjustified closure of the courtroom for the entirety of voir dire violated the defendant's Sixth Amendment right to a public trial. We therefore VACATE his conviction and REMAND for further proceedings not inconsistent with this opinion.