Wargaming Bases - Oval is a collection of print-ready oval bases suited for your favourite wargames.

It includes the following sizes: 60mm x 35mm, 75mm x 42mm, 90mm x 52mm, 105mm x 70mm, 120mm x 92mm & 170mm x 105mm.
If you need a custom base size, you can just take an existing base and rescale it in Bambu Studio.
 

If you are looking for round bases, I have got those too: Wargaming Bases - Round