Question: what are the best sleeves for baseball cards?
Answer: #1. ... 
Ultra Pro 3" x 4" Toploaders and Clear Sleeves for Collectible Trading Cards (Includes 100… ... 
Ultra Pro Soft Card Sleeves 2-5/8" X 3-5/8", Ultra Clear (100Count) ... 
BCW Backing Boards, 7 x 10 1/2", Silver. ... 
BCW (25) Brand Trading Card Toploaders - Rigid Plastic Sleeves - TCSVTH.