Dudek Reserve side container s/m volume/size

Does anyone know what the volume of the s/m reserve container is for the
Dudek Comfort harness low?
On the site, openppg, it only lists the dimensions not the volume.

4 × 10 × 2 inches = 80 cubic inches = 10.16 x 25.4 x 5.08 cm = 1,311 cm 3 = 1.311 L which is extremely small.

What is the largest reserve that would fit the s/m pouch. 120/160?
Thanks

I have a Mayday Square Mayday Square - Apco Aviation Ltd.
in Dudek Comfort Harness - S/M. It is a tight fit but no problem at all.

Thanks for the reply Allex! The vendor I’m buying from is asking for the volume of the container so they can sell me the correct size reserve. Thanks for the information I can use it for comparison. I appreciate it.