Missguided Maxi dress Size 12 US size

Dusty rose ribbed off the shoulder maxi dress. Length 42”. Arm pit to pit 15”. Dress has some stretch. Polyester 95% and 5% ELASTANE. Tag states made in UK Size 14. So I assume UK size 14. Model wearing dress is between a size 4 to 6 and 5’8” tall. Gently worn.