No 10 (4-1/8-x-9-1/2) - in Package Quantity: 50 per package - Letter envelope choices are here

Cougar Opaque - Business Envelopes - Square Flap - WHITE (28/70) - NO. 10 Envelopes - 50 PK

[Clearance] Stardream - AZALEA No. 10 Square Flap Envelopes (4.125-x-9.5-inches) - 50 PK [BNW]

Cougar Opaque - Business Envelopes - Square Flap - NATURAL (28/70) - NO. 10 Envelopes - 50 PK

[Clearance] Stardream - FAIRWAY No. 10 Square Flap Envelopes (4.125-x-9.5-inches) - 50 PK [BNW]

[Clearance] Stardream - FLAME No. 10 Square Flap Envelopes (4.125-x-9.5-inches) - 50 PK [BNW]

[Clearance] Stardream - LAGOON No. 10 Square Flap Envelopes (4.125-x-9.5-inches) - 50 PK [BNW]

[Clearance] Stardream - PUNCH No. 10 Square Flap Envelopes (4.125-x-9.5-inches) - 50 PK [BNW]

[Clearance] Cranes Crest (Wove) - NO. 10 Envelopes (Square Flap) - 100% Cotton - Pearl White - 50 PK [BNW]

[Clearance] POPTONE Hot Fudge - NO. 10 Envelopes - 50 PK [BNW]

#10 Business Envelopes - Cougar Envelopes