Designed to look like polaroids.
Specially sized sleeves also sold.
Published by Movic. Official site: https://www.movic.jp/shop/pages/komacole.aspx
Takes a single scene “koma”, puts it in a frame for “col[l]e”ction, so komacole.
Two types: Stand Badge Type and Magnet Type.
The Bleach Clear Soul Plates are part of the Jumbo Carddass line from Bandai, meaning that they're about the size of…well, anything else from this line, including mousepads, sealdass, and possibly shitajiki type things.