Toploaders are a semi-hard sleeve designed to fit Magic: The Gathering and Pokèmon plus more standard sized trading and sports cards.
Toploaders are clear and can be used in various ways, the most common method is to first place a card in a soft sleeve then place it into a top loader. Toploaders are clear on both sides so you can also place two cards back to back in one saving on storage space.
They will fit trading cards and stickers up to 2.75″ (7 cm) Wide and 3.8″ (9.6 cm) tall and 1 mm in thickness.
The actual size of the top loader is 3×4 inches.