pretty much what MMs property said.. with a very tight, but wearable fit, the Neo can work okay, but I never made it past about a week locked without chaffing. For the price look at some of the stainless steel devices on DHGate.com, or watch the "For Sale" here for one that matches your measurements, at least to give it a try and see before spending money for a custom build.. Remember, go with your smallest measurements, too big will be uncomfortable, way too small is bad, but a smidge small will normally work as you get used to it. I've had to look for a smaller device than the MM Jailbird i had as I got used to it and it became too big.