This tray/bowl/insert or what ever you want to call it, was designed to fit inside a little parmacy cabinet that is usually used in bathrooms but has just two flat boards. Therfore you can't fit very much inside without everything falling out when you open the cabinet.

The dimensions add a lot of storage space without the hazzle of playing tetris with your stuff so nothing will fall out.

The dimensions are: 

X 200mm

Y 105mm

Z 70mm