Size 38 Alpenclassics German Blue Midi Dirndl for Oktoberfest (see size chart). I haven't even taken the dress out of the packaging - I ordered at size 36 and 38 because I wasn't sure which size would fit. The photo of me is in the size 36 and it fit like a small. I would assume the 38 fits like a small/medium, but also look at the size chart for the measurements! I LOVED wearing this I Munich, Germany for Oktoberfest. Here's the link for the dress: https://www.alpenclassics.de/midi-dirndl-2tlg.-58cm-miriam-blau-grau-16086?c=2849