Flat Object Counter
Clothing Items, Sheets
counter
The kanji and the word are exactly the same. That means they share meanings as well, so this is flat object counter.
This counter can be used with various "flat" things, such as clothing items, sheets, paper, stamps, dishes, and more. Notice how they're all kind of flat shaped?
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
日曜日のサッカーの試合のチケットを十枚持っています。
I have ten tickets for the soccer game on Sunday.
いつもは朝ご飯は食パン一枚だけです。
My breakfast is usually just one slice of toast.
トーフグのステッカーを何枚か買いたいのですが、一枚いくらになりますか？
I’d like to buy some Tofugu stickers. How much would one be?