Choose your wall decoration size

In our photo product app we also sell wall decoration.
To help people choose a size we help them by giving them a bit more guidance on how big a canvas is compared to e.g a living room object.

The user see all the sizes by swiping left and right, or tap the arrows next the product size and price.

First time prototype in proto.io. So not perfect/done yet. Can't figure out yet how to link the product details to a certain size. Tips?