It's a very common question with an easy answer!
Collector's like you have different preferences in how they collect, such as different thickness/gauge of pocket sheet brands they use. Some place cards one per pocket or back to back, while others collect favorite teams or star players etc.
The below guide is meant to provide you with a conservative estimate and eliminate confusion when choosing the size that's best for you.
*Size refers to D-Ring capacity, NOT the width of binder spine.
If you're still unsure, feel free to contact us with any questions.
We hope this makes choosing the right size easy!