Stockroom Plus Corrugated Card Protector Sleeves - Durable Trading Card Cardboard Protectors - Folded Cardboard Sleeves for Flat Folder Storage - 3 x 4.5 in, White, Pack of 75

We use these to ship sports cards to customers as added support in the packaging. Part of our packing supplies for ebay sales. Have never had a complaint. Product is as advertised. Great value. True to size. Fits in a standard envelope.

If you need sturdy, reliable protection for your sports cards, this Stockroom Plus 75-Pack is a great choice! The corrugated cardboard is thick enough to keep cards from bending during storage or shipping.✅ Strong & Durable – Protects cards from damage.✅ Perfect Size – Fits standard sports cards with ease.✅ Great for Shipping & Storage – Keeps collectibles safe.✅ Bulk Pack – 75 pieces is a great value.The only small downside? They could be a little smoother for perfect stacking, but they get the job done! Highly recommend for collectors and sellers!

These are my go to when shipping and storing sports cards

These are great for the price. My fiancé uses these to ship his cards!

I use these to protect my trading cards during shipping. They’re great! and they’ll still fit through for the requirements of letter mail. (as long as it’s just a few cards, or 1 top loaded card)

Quick delivery and as advertised

pricing

There is nothing wrong with the sleeves themselves but they are too large to ship trading cards in a PWE without risking the envelope getting caught in the mail sorter. Use them for something else.