A4 Envelopes for 4x6 cards - CutCardStock

Envelopes that will fit your 4x6 inch cards like a glove.  These A4 envelopes are perfectly sized at 4.25 x 6.25 to hold any 4x6 enclosure.

Card Stock 5x7 Paper

Envelope Liners A7 Solid Square Flap - Cards & Pockets

Envelopes - Fine Cardstock

Envelope Size: 4.25 x 6.25 Perfect size for your 4x6 photos! Envelope Enclosure Size: 4 x 6 - Perfect size for 4x6 Flat Cards, Photos etc. Weight

Premium Smooth A-4 Square Flap 4.25 x 6.25 Envelopes - 50 Pack - Perfect 4x6 Photo envelopes! Also Great for Post Cards, Announcements, Details

Cards and Pockets - Cut Cardstock

Happy Valentines Envelope Set Set of 5 Jumbo Snail Mail

Classic Linen 4x6 Folded Discount Card Stock Blank 4x6 Linen

Joyberg Blank Cards and Envelopes 4x6, 30 Pack White

LUXPaper A4 Invitation Envelopes

Halloween Bat-Lock Envelope template – Handsel Papery