These are little inserts designed to be stackable inside a small 22cm x 10cm x 6cm storage box picked up from a cheap / discount shop.

Update: Please note I have designed up "Quad" and "Hex" sizes however I cannot print the the Hex version due to bigger than my print bed. Dimensions should be fine however had started noticing some flaws in the quick prototyping that I have used to make the boxes which may become troublesome :)