Dunwell Small Presentation Book 5.5x8.5 (2-Pack, Black), 24 Pockets Display 48 Half Size Pages, Plastic Binders with Sleeves, 5.5 x 8.5 Mini Booklets, Acid-Free Poly

I print mine in a 2:1 reverse booklet and slide them into a sleeve binder: https://a.co/d/07XPX75x Normally, I'll just use PDF Wallet, but will throw those binders in my bag if I'm shooting somewhere new.