2 dogs,
I recently purchased a pair of Stabilicers in size XL, and they just barely fit my size 12 white mickey's. They're supposed to be for boots sized 12-14. I bought them online at Campmor.com, and they also carry size XXL for boots sized 14-16.
Stabilicers are vibram soles that have hex-head type screws inserted into them, and they strap over your boots with nylon straps secured by velcro. They are $40 at Campmor, which is $10 cheaper than what Cabela's is selling them for. Also, Campmor is one of the few places that I've seen that carries the XXL size.
I haven't used them yet, so I can't tell you how good they are. They appear to be well made, and I have read several good reviews about them. I've been ordering from Campmor for years, and I've never had any problems there.