Our clothing comes from many different manufacturers from all over the world. Each manufacturer may size and label products differently.
Every product page has a unique sizing chart that shows recommended sizes in both inches and centimeters. The most common points of measurement are waist and chest. If you are between sizes, we usually recommend choosing a larger size.
If you usually wear a size M, this doesn't necessarily mean that you will wear a size M for each product at Modern Undies. A size S, L, or even XL may fit you better depending on which product you are interested in. We recommend using the number measurements on each sizing chart instead of the letter sizes to ensure the perfect fit.
If you have any questions about sizing or how to find a product that fits you, you can ask us here and we will be happy to help!