Tecnica Tan Brown Snow Boots Tall Lined Made Italy Sz EU 45-46 Men's Vintage
Pre-owned. PLEASE READ! Rare vintage item with flaws!!! The rubber soles are splitting and I don't think they would hold up with actually wearing for  longs hours in snow. But overall are in nice condition for their vintage age (era unknown). They would make a nice collector's item or could be worn for a photo shoot. The exterior has a nylon fabric feel with light normal marks. The rubber has yellowed a bit. There is a brown leather trim. Not sure if it's real leather or not. Lined on the interior. Clean and nice overall. 
According to the Tecnica size convention chart a 45-46 would be about an 11.5 - 12 in USA men's sizing.
Measuring with a tape measure across the bottom from one end to the other it's 13.25" across.