Question For Those Who Use Three-Ring Binders

I use a mixture of 3- and 4-ring binders. The 3-ring ones are mostly from Stanley Gibbons and were designed as coin albums. Most of the 4-ring binders came from my workplace: they weren't stolen, but were rescued from a skip when old paper records were either destroyed or computerized. I lie the albums flat when storing them.

punman - I purchase my 3 ring binders at Staples, their heavy duty type.
The 2 inch size for my 5 cent, 10 cent and 25 cent collections. (1 for each type).
The 3 inch size for my fifty cent piece collections (1 for proof, 1 for specimen and 1 for uncirculated/business strike)
The 3 inch size for silver dollars
The 3 inch size for proof toonies & loonies.
In other words the size of the binder depends in the size of my collection of that type of coin..
I use non-pvc 20 2x2 metal holed plastic pages for circulated coins.
I use Lighthouse quadrum square coin capsules for proofs, specimen, commemorative or rare coins, housed in Lighthouse 20 pocket Encap binder pages.