Need Help - SR20DET CP Pistons

[BoostMunchies]

Hi, I am rebuilding my engine and am currently having an issue ordering piston rings because I bought the pistons second hand and do not know the compression ratio, only the piston bore size, 86.5mm. I need the measurement of the dish of the piston. I tried with my harbor freight dial indicator to get the dish measurement and got around .205" - .214" . I can't find specs on the pistons anywhere to see whether or not these are close. I hope someone here has encountered this and can help me out, gonna throw a pic up just because.

Thanks

http://i661.photobucket.com/albums/uu339/kory_k9/100_0790_zps059f5f5d.jpg