
Although the envelopes are roughly 7x9" (see pics), they worked for what I needed. Perhaps they're not all uniform, coming from the factory.For anyone wondering, I was able to use these at the USPS First-Class Mail Large Envelope rate, using Stamps.com/Endicia to print the postage. Refer to the USPS website for the current rates.

Premium 3-Inch Heavy Duty Brown Shipping Tape - 24 Rolls Of 110 Yards (330 Feet) - IMBAPrice 1 Box
22 Review

40 #10 Security Tinted Self-Seal Envelopes - No Window, 24 LB White EnveGuard Size 4-1/8 X 9-1/2 Inches - 40 Count (34140)
19 Review

π¦ uBoxes Large Moving Boxes 20x20x15 - Pack of 6 | Durable & Spacious Moving Boxes at Great Value
36 Review

Track Your Finances With Ease - Set Of 60 A6 Budget Sheets For Budget Planner Binder
22 Review

Coolrunner Mixed Food Resin Flatback Kawaii Cabochons Decoden (60) - Adorable Assortment of Miniature Treats for DIY Crafts and Decor Projects
9 Review

Anezus 6800Pcs Rhinestones Kit: Sparkling Accessories for Countless Crafting Projects
7 Review

Easter Egg Decoration Kit: Lot of 5 Heat Shrink Wrap Sleeve with Flowers and Icons for 35 Eggs
8 Review

π Sizzix Adhesive Sheets: 6x6-Inch, 10-Pack - Premium Quality for Crafting & Scrapbooking
8 Review