I'm a Midi Fit pouch (PF6), I have 6 slots for essential oil bottles with a slimmer model pouch. 
 
The pouch fits perfectly to standard size of essential oil bottles from 5ml, 10ml or 15ml.
The pouch itself is padded on each sides to minimize any possible damage if it has direct contact to hard surface. 
 
The size of Midi Fit Pouch is 16 x 12 x 6 cm