This is a bundle of 5 packs of 100 penny card sleeves, that's 500 to protect all your cards from the Star Wars LCG card game and some expansion decks
Penny card sleeves may be 15% thinner than standard sleeves but they are also about 30% cheaper than standard sleeves

These sleeves are 2.5 X 3.5 inches  but the image of the item shows 2 5/8 by 3 5/8 inches.. why I'll let Mayday Games explain

Good question! The Green (MDG-7041) are in fact the SAME size as the almost-a-penny sleeves advertised as 2 5/8 x 3 5/8 inches. Yes it's confusing but if you look at most "Penny sleeves" on the market they advertise as 2 5/8 X 3 5/8 too, mostly because they are actually too big for the cards they are designed for. Ours fit closer to the card so are actually closer to 2.5 X 3.5 as the Green ones (and these)