I've spent a lot of time trying to find an inexpensive and quality solution - here it is. I can put them in a picture envelope, mail them in a plastic bag, and they'll arrive safe and sound (assuming the USPS doesn't decide to consider my "fragile" stickers a silly personal challenge).
Drive Medical M6026 Convoluted Foam Mattress Pad - White
3 Review
BOX USA BSP1814 Corrugated Sheets: Premium Packaging & Shipping Protection
3 Review
Juvale Corrugated Cardboard π¦ Sheets: Reliable Packaging & Shipping Supplies
3 Review
π‘οΈ Shield and Safeguard Your Valuable Trading Cards with Card Coats Shipping Protectors
3 Review
Innovative Nifisa Honeycomb Alternative: Remarkable Cushioning for Ultimate Comfort
4 Review
π¦ 6X10 Inch Pouches for Secure Cushioning in Shipping Supplies
3 Review
π¨ Fuxury Blue Anti-Static Bubble Cushion Wrap Roll - 2 Rolls, 72 Feet Total: Protect and Secure with Air Bubble Technology!
3 Review
π¦ Perforated Stickers Packaging for Cushioning during Shipping
3 Review