Inspired partly by Duzza's "Thinnest Racquet Ever" thread, I'm taking the opportunity to post some fairly extreme beam-width comparison photos of a few racquets, from a 9mm beam Wright & Ditson wire-strung metal/wood racquet (circa 1920) to a 1970s 13mm beam Wilson T2000 to a more recent 30mm beam Wilson Hyper Hammer 3.3. Pretty incredible differences in beam width from the 9mm to the 30mm. Don't know if there are any racquets out there with narrower than a 9mm beam or wider than a 30mm beam, but this is the best I can do from here. All measurements are done with my el cheapo plastic vernier calipers, so if I'm off by a half millimeter, well...what can I say? I'm betting this is all pretty close, though. Here's one photo of those three racquets side by side (beam-wise, that is).