If you're wondering what size binder you will need for a Destined Rivals Master Set with no cards stacked on top of eachother, we recommend a 12-pocket binder with 480 pockets. 

Here's the set breakdown:

• 182 Numbered Base Cards

• 166 Reverse Holo Base Cards

• 62 Secret Rare Cards
   

Optional Extras:​

• At this moment we do not know of any extra cards for this set. 

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In total, a complete Destined Rivals Master Set contains 410 unique Pokémon cards.