Cavallo Gela Long sleveless Coat

I am a size 10 UK 2-4 USA tried on the 10 USA  fit perfectly, but USA  sizing does not seem to be correct So I sized them myself! S M L 

This waistcoat is a long, hybrid quilted waistcoat with a stand-up collar. Featured is a shiny silver 2-way front zipper with a Cavallo jewelry pendant. Two front zip pockets have the Cavallo jewelry pendant as well. Cavallo logos are on the left flap pocket, left chest, as well as on the back of the collar and on the back yoke. The back includes a long, tonal zip which allows wearing while riding. The back also includes a slightly rounded longer back hem. The armholes are trimmed with elastic logo tape.