Make sure you order your clothes and costumes in the correct size.
Variations between manufacturers
The clothes and costumes featured on this webshop are from several different manufacturers, who may each have their own sizing charts. This means sizes can differ from one manufacturer to another. In some cases the sizing chart is provided on or linked to on the product page.
If there is no sizing information available in the product page, you can use the generic sizing charts on this page to get a global idea of the sizes. Please mind that these don't guarantee a perfect fit.
If you don't live in the United States, you may be used to different sizing denotations. The tables below also convert US sizes to international sizes. Please mind that these also merely provide an indication.
Generic sizing charts
Womens vs. Junior sizes
Several years back the fashion industry mysteriously created a new t-shirt group called the Juniors T-Shirt. It has caused confusion since day one.
A Juniors t-shirt is a t-shirt for women. With the popularity of the Junior Baby Doll Style T-Shirts, t-shirt manufacturers began to create their womens t-shirts with a more tapered or slimmer fit. Soon the term Juniors was invented. Most of these manufacturers do not make any other type of womens t-shirts. They just make Juniors T-Shirts. In other countries all juniors t-shirts are just called Womens T-Shirts.
If you are a woman looking to purchase a t-shirt of a style that you are used to purchasing, purchase the same size. If you truly feel that you do not wear the juniors style t-shirt, size up. To be safe always go up one size.
(Source of this information: http://www.teeshirtsrock.com/sizechart.aspx)