Excellent guide Gavla, all good advice.
My experience so far agrees that if you think small will do it, go for medium - Meili is a a short girl but she has surprisingly long legs so small just wouldn't go comfortably without the dreaded baggy crotch.
Another observation - tights seem to be a lottery in terms of quality and longevity. I got some lovely tights from Amazon which look and feel awesome, however they stretch. After wearing them once (her not me!!) I took them off carefully, but they are definitely longer after putting them back on. They still look good but the waistband could easily go up to the bottom of Meili's boobs
