On a family ski trip, everyone needs a different size. In Johku, the customer picks a size for each participant separately and sees right away how many of each size are available for the chosen time.
One product, every size
All size options are under the same product, so the customer doesn't have to look for the right size across different products. Availability is calculated size by size, so you don't sell a size that isn't available.
Ready before pickup
The booking can only be made once a size has been chosen for each participant, and participants can be named. You know in advance which sizes to get ready, and for whom.
Equipment for more than one person too
For equipment such as a tandem kayak, the customer can pick the exact item they want. Johku's product library has a ready-made template for equipment in different sizes.