What is the sizing like for "Deadly is the Female"

[KatyMac]

Particularly in the smallest dress sizes?

DD has spotted one for her prom - but I don't want to get the size wrong & I can't spot a shop

it's this one

bump

Their shop is in Frome, Somerset if your local to visit - otherwise they are good with returns and exchanges.
The dresses are from different brands so best to call and ask before ordering.
I am a size 12 and bought a dress from them last year in a M but tried another style in XL and it was too small

OK I will do

The XS would easily fit DD's waist but her bust might be too big - she is a bit too hourglass

& we are in Norfolk so it's just a bit far.....

Thank you