Thanks, yeah think pinhead may be the hatchlings I got, I'll go with size 2, thanks for the info, much appreciatedI couldn't see anything because it said not available in my area. You're in the U.K. , funny that it wouldn't show me the products though. In the U.S. the cricket vendor might advertise as pinhead [ way too small] then by fractions of inches 1/16, 1/8 then 1/4 + up . You'd probably go with something that is the 1/8 size converted to centimeters. Be very sure they understand the size you need for these tiny Rankin's babies.