First, I am looking at a pair of tall boots on eBay and asked the seller for a measurement of the shaft (because I have huge man-calves). She measured the shaft laying flat and it measured at 7" (or a little more...her words, not mine) front-to-back. How do I figure out what the diameter of the shaft is? Should I just email her back and ask her to measure the diameter for me? I need at least a 16" diameter shaft.
Second question is regarding velvet helmets. I have a velvet helmet that fits me pretty well...the problem is that it doesn't have a chin strap. Is there a way I can add my own chin strap? I've seen them with elastic, which I could do myself, but they don't seem very secure (I could be wrong...I've just seen pics of them with elastic). It's a nice helmet in good shape, so I'd rather not have to buy another one (paid $7 for it at a thrift store).