Its a beautiful piece, the embroidery is done using actual pearls and real diamontes not any stickers or sequins which makes it different from cheap stuff available online or even in the shops, it was purchased from a specialist in India (Diamond silks Punjab)

Measurements (in cm or inch)

It can be resized and can fit from a size 12 to size 14 ( Australian) size top.

Room for alteration (margin)? Provide details (in cm or inch)

Yes it can fit even size 10 person with more alternation done professionally.