Wicked Costumes Adult Womens Mamma Mia Fancy Dress Costume

Are the trousers elasticated waist only I’m bigger round the waist than the measurements but if elastic might be ok?

Hi I’m a size 16 but have large boobs so buy an 18 but they are always big on me do u think the 14/16 would be roomy enough xxx

How do you order the size you need.