My toys are available in five firmness levels: Extra Soft, Soft, Medium, Firm, Extra Firm.
Extra Soft: Shore 0020
Soft: Shore 0030
Medium: Shore 0050
Firm: Shore A10
Extra Firm: Shore A20
Smooth-on has a Shore Hardness Scale here.
- 0030 is about the same firmness as a gel shoe insole. It is very soft and forgiving.
- 0050 is about the same firmness as a small gummi bear.
- A10 is about the same firmness as an erect penis, although a bit bendier.
Please keep in mind that all firmness levels might not be in stock at all times.
I generally cast smaller toys, such as the Moon Orchid, in firmer silicone and larger toys in softer silicone.
Soft and Extra Soft feature a mildly tacky surface, akin to slightly wet skin.
How firmness is perceived also has to do with toy size. A small toy in Medium firmness will feel softer than a large toy in the same firmness, and vice versa.
Still unsure which firmness to pick? CuriousKitt wrote an informative blog entry that might be of help to you!