1 Funko Pop! Sailor Moon / Wrinkle in Time 3 pack protector!   This protector also fits the Rampage 3 Pack, Splash Mountain 3 pack and the Haunted Mansion 3 pack.   There may be others now but these are currently the only ones we know of that fit in these.   

These fit 3 packs that are roughly 9 13/16 x 6 1/4 x 4 1/4 or 25 x 15.9 x 10.8cm. That is not the protector size but it is the size of the Pop box that fits in these.   

14mil .35mm Acid-Free PET plastic

Removable Peel Film

Auto-Locking Bottom