These are Quality Heavy Duty Vintage Sorel Made in Canada Snow Boots

There aren’t a lot of markings but the boots say Sorel with Kaufman in a Maple Leaf Symbol. I believe they are Sorel Dominator Model and part of the Kaufman Line.

Size indicators were difficult to find on these but found an 8 imprinted in the inside of the boot under the liner. Had to remove the liner to find. While it says 8 I added a picture of the outside measurement because these seem like a big 8 but the inside will obviously shrink down a lot with the heavy liner inside it.

See all pictures to assess everything