We have been in the business of size recommendations for a couple of years now - but we are new to shopify :)
If you have a fashion store and want to increase customer satisfaction, reduce insecurities, push them to check-out and also do not bother about returns - then our App is the right thing for you.
The underlying sizing algorithm is based on real 3D Body Scanning Data (this is our homepage twinster.eu ) and we are masters in the complexity around sizing :)
In our App you can create simple size charts and depict them in the store for information purposes to your customers. But you can also use our algorithm. The people can then enter some data about themselves (height, weight etc.) and we do the magic in the background. They get the correct size recommendation and know what to buy :)
Our support is there for you as quickly as possible 24/7, if you need any help - especially in the beginning, when setting up and matching your first size charts :)