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NASA waves off spacewalk after astronaut suit springs a leak
(edition.cnn.com)
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There are always some on ISS. Somewhere from 4-6 is typical from what I've read. In a mix of piece sizes too. The EMU is modular enough to fit most body sizes by matching different leg and torso combos.
There are only around 18 or so total suits too. They get swapped around from Earth to ISS regularly for refurbishment.
Reading your comment made me remember seeing a documentary about the suits. They are also pretty old, or?
Yep. They were originally part of the Shuttle program. They cost around $20M each so NASA has kept them going.