(Bad Dragon toys are within A-2 through A-8)A30 is by far the hardest toy you'd want, unless for Chastity.
A20 is very hard. If bent, it will recoil.
A10 is a standard, as hard as a normal dick. Some give, but not much.
Shore 00-50 I have not tested yet.
Shore 00-30 is a great firmness for toys, with a gentle firmness, but with plenty of squish.
Shore 00-20 is nearing the softest toys, very wiggly, and will squish a lot.
Shore 00-10 is nearly only used for fleshlights, very soft, perfect squish.