I have a typical SKS 20" fender in the front:

https://www.sks-germany.com/en/produ...-53-black-set/

In the rear I use a removable fender so I can fold the bicycle more easily.

https://www.sks-germany.com/en/products/x-tra-dry/

You can still fold the bicycle with a full size rear fender, you just have to be careful how to store it.

The rear fender works well in the rain. It also works for mud though the seat tube and chainstays tend to get a bit dirtier than with a full size fender. Overall I am happy with the setup. If you want a full size rear fender then I would suggest you get a set of SKS 20" fenders. Else go with my setup. Also Planetbike makes 20" fenders which were available through Xootr, so they should be a good fit.

Regards,
Josepoh