These are about 90 cm long (x 2) by about 25 cm high by 20 cm wide right angle corners of foam. Hard to describe but they came with ikea fold out sofa bed from the eighties and they would form the back and sides of the sofa.
They are in black fabric which can be taken off and washed (and needs it after my garage). I imagine these are great for a camper van or moroccan style lounging on the floor- or as a little baby play area surround. Or just for the foam.
See picture !
Coathanger on floor as reference of size.
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