Sizes at petite bateau - help needed

[Luggs]

Can anyone help ?I am a UK size 8 and would like to order a petite bateau t shirt - really confused as says size S is for a 14 year old. Which size should I order?

My size 8 French friend wears age 14.

they mean a child age 14! s should be fine, i amd a size 14 and a 18 (years) / L in pb. they are fab, v good quality

Thanks I will order a small