Why does nobody mention how much EVA foam can swell in humid air?

I measured my Minecraft sword at 34 inches before starting, then after a week of 80% humidity in my basement it stretched to 37 inches and now it won't fit in my display case, has anyone else dealt with foam warping like this?

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claire_campbell5d ago

Oh man, 34 to 37 inches? That's basically a growth spurt I had in 8th grade but way more annoying." I totally feel your pain on the foam swelling thing though, it's like the humidity has a personal vendetta against your display case.