Hi, this is TOMEKO.
Have u ever heard of OCHAZUKE, rice with green tea or some kind of broth.
Actually it is very common in Japan but you would have never experienced that. You should remember it with this item.
Character Sleeve Collection Nagatanien [Ochazuke-Nori] 
Actually I'm not familiar with so-called trading card but I know the item callled "sleeve" is something like small clear file folder for trading card and is used to protect and keep the trading card tidy. Hmmmmmm it sounds like a must for the card collectors ^^
As long as I know, many of sleeves have no image or images of anime girls but why this has an OCHAZUKE image ? Scattering OCHAZUKE on a table ?
Now I can give you an advise for you. There are a wide variety of trading cards on size. Please check the size of your trading cards and select the correct sleeves.
Thank you and see you soon