Size Category	Centimetres (approx)	Inches (approx)
Micromount (MM)	Under 1.5 cm	Under 0.6"
Thumbnail (T)	1.5 - 2.5 cm	0.6" - 1"
Miniature (M)	2.5 - 5.0 cm	1" -  2"
Small Cabinet (S)	5.0 - 10.0 cm	2" - 4"
Large Cabinet (L)	10.0 - 30.0 cm	4" - 12"
Museum Size (O)	Over 30 cm	Over 12"