If like me you get confused with all the different sizes clothing brands use in their products. If adding to that you’re buying online and can’t actually try on the clothes you want to buy. You will want to try this app
It lets you create a profile with all your measurements and searches its database of online retailers for all the available products within your fit.
You can also choose your favourite brands so it will only look within those retailers. This feature seemed to have a few glitches as it couldn’t find any products within a handful of brands I usually shop at.

EyeFitU is free to download from the App Store (iOS) and Google Play (Android).