Expanding slightly on @tombull89 's comment. The 212, and other similar 120mm tower coolers should fit in any case that puts a 120mm fan over the IO panel. At this point, that's most full size aftermarket tower cases; with 80/92mm fans in that region (and no minimal space between the side panel and expansion slots) are uncommon outside of OEM designs and thin cases that only support half height cards. Worries about heat sink fit in conventional towers is mostly only a problem with the even larger 140mm towers or if reusing an older case.