The Oil Stick range includes 63 colors + 1 medium.
The solid oil sticks exist in 3 sizes: 38ml (standard size, 64 references) and 96ml (large stick, 8 references) but also a 12ml stick (mini) present in the initiation sets. 3 price levels (series 1 to 3) depending on the pigments used in the manufacture of the color (Extra-fine Artist quality implies a very high pigment concentration which impacts the price of the stick)

Oil Stick

Medium Oil Stick
( = 3/4 ; length = 5 )

Large oil stick
( = 1 1/8 ; length = 5 7/8)