I would recommend standard 3"x4" top loaders for Pokemon cards, they usually come in packs of 25, don't forget to put the cards in penny sleeves before top loading them for a little added protection.
How do I protect my top loader?
https://www.youtube.com/watch?v=KfiTfjgmU1c
How do you store card savers?
Once you have your cards sorted, it's always best to store them in card savers and then figure out your next move. You may want to keep them all together inside a corrugated storage box, or simply any size (100-count, 200-count, 500-count, etc.)
How do you protect Pokemon cards in a binder?
https://www.youtube.com/watch?v=wrp5RgQfTXE
Are card Guard binders good?
5.0 out of 5 stars Received Quickly and Works GREAT! These binders are actually quite sturdy! They hold a LOT of cards and I was able to organize my collections quickly and I feel very secure in the knowledge that my cards will not be damaged!
What is the best binder for Pokemon?
Vault X Premium eXo-Tec 12-Pocket Binder Classed as a premium quality trading card binder this one features a zip around the edge to keep your rare Pokemon Topps cards carefully sealed from dust and water. It has 20 pages which can hold up to 480 cards.Jan 1, 2022
How heavy is a card in a top loader?
General weight information: a top loader weighs 7.2g / 0.25oz. 3 cards in a penny sleeve weigh 5.8g / 0.21oz.