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Nintendo 64 games were ROM cartridge based. Cartridge size varied from 4 MB (32 Mbit) to 64 MB (512 Mbit). The dimensions of the cartridge are 4.5 x 3 x 0.1 inch.
Nintendo 3ds 3
Super nintendo cartridge
Nintendo n64 cartridge
Nintendo game boy pocket 3
pretty close i placed a n64 cart over to prove it
100% correct ! it was the exact size as my catridge !
a bit small