CHOICE REVOLUTION Abs Muscle Toner, Belt- Equipment Workout Abdominal Toner- Red

I wish I had known about these long ago (maybe they didn't exist long ago)! I love this, it saves so much pain on my thumbs and is a much better way to hold the camera than the tiny thumb spot on the camera. I do have to say that I have pretty large hands, so I've always struggled with where to put my digits on the camera. I bought one for every one of my DSLR and mirrorless cameras.

Fits and works perfectly as intended. Very, VERY comfortable thumb rest on my A7rii. May seem a hair pricey but it is made well and it is about your only option without saving a few dollars and ordering from China. Highly recommend!

Fits great on my a7