I'm a fan of both the DPA UA0896 and the Big Ass Shure (A81WS) and can attest that they both comfortably fit up to at least 21mm width microphones. However, they are most effective in different environments and applications. The DPA are good for combating drafty venues, blowing HVAC vents and very slight winds outside. The Shures are great outdoor windscreens that will tame all but hurricane gusts but that comes at a price: the Shures are a bit less transparent than the DPAs and slightly shave off a little high frequency response. That's fine as I'd rather do a little post EQing rather than have an unlistenable recording due to constant wind noise, but I think they're overkill for indoor recordings.