Here is a ladies' flat hinged wallet with Boom theme.
The pink wallet has geometric patterns near the edges & the whole good-guy cast on the front with Sticks, Knuckles, Sonic, Amy & Tails, all as 2D art. (usually they are always CG) Flat hinge-wallets like this are generally a 'ladies item' because it only fits in a purse or backpack, never a standard pocket. The little button on the top springs it open. This is a SegaShop item in 2018, and it is 21.95.