According to Consulate General of The Russian Federation In New York, the photo size must be 35x45 mm.
It seems like not a lot of places would take a 35x45 mm photos around you
The nearest place you can get it may be miles away if you are not close to the Russian consulates.
But we would like to show you how it's done with Tomamor.
Who has a centimeter ruler anyway?
Upload a photo of yourself like the photo above. Take multiple in good lighting. The background can be anything as long as the color isn't too similar to your hair color. The rest will be taken care of by Tomamor.