So I've bought a bunch of different Penny sleeves over the years. These are by far my favorites. They pre slit the corners and cards slide in perfectly. Still failing with top loaders. CardShellz Penny Sleeves CardFather Live Supplies CardFather Sports Cards Introducing the SlimLoader, our new slimmer toploader designed to pair seamlessly with our standard Easy Glide Sleeve. This snug fit ensures your cards are protected while maintaining a sleek profile, offering an Easy Glide Soft Sleeves Precise Fit Cardshellz Easy Glide Sleeves for Standard Trading Cards Notched Card Sleeves Card Capsule Amazon.com: Bellroy Card Sleeve (Premium Leather Card Holder or Minimalist Wallet, Holds 2 8 Cards or Business Cards, Folded Note Storage) Black : Clothing, Shoes & Jewelry