The fjords at the therapeutic barn that my pony is leased to are all in Bucas rainsheets in the winter, but in my opinion they are a touch narrower in the chest than I would prefer them to be.
My pony is a 14 hands high and 14 hands wide morganXhaflinger and he best fits the Amigo XL cut blankets. In the regular cut I need to go up to a 75 or 78 (he should be in a 72) in order to give the extra width, and I compensate for the butt overhang by using a shorter tail cord. In the XL cut he wears a 72 for plain rainsheets, but I go up to a 75 for the shell and liners for his winter wear to compensate for the added bulk of the liners.
My guy gets sweet itch and is in a Premier sweet itch blanket in a large, which should be equivalent to a 78 but it is still smaller than it should be on him, but the next size up was dangerously long front to back and would have needed the belly band shortened dramatically. Thankfully he only needs to wear it from dusk to dawn so during the day he can move more freely.
He does not fit Rambo or Rhino, or any Wug style front closure blankets. His neck ties in too low in his chest and the wugs do up too high and end up choking him when he goes to eat.
Weatherbeeta can sometimes work in a 72 but it seems to vary between styles. Sometimes they are too long in the drop and hang down past his knees! Haha
Here off the coast of BC, sheets are a necessity for half the year or more. We get way too much rain to let them be naked. Two of the fjords get their bellies clipped so that their girth area stays dry and clean, and my haflinger cross gets full clipped or he sweats like a pig and never dries out when he gets worked even lightly. None of the fjords ever wear more than a rainsheet. My guy rotates between rainsheet with neck and no liner, up to rainsheet with neck and 250g liner depending on how miserable it is. I like the liner system because swapping out the top sheet for a dry one when it gets soaked is a LOT easier than dealing with soggy winter blabkets here. Haha!
As for fly masks, my guy wears a cob size bridle and is in a horse size Amigo mask with ears. Our biggest fjord is in a horse sized Cashel mask (they fit large). We have a gypsy cross who wears a Noble Outfitters mask in either Cob or Horse. And our 17hh draftX is in a warmblood sized Cashel with full nose (that only goes halfway down his loooong face).
Anyway, his owner has an 81" Rambo Protector fly sheet on him which is too long in the body causing the butt strap to hang too low. She says he needs an 81" because of his broad shoulders and anything smaller rubs his shoulders. That certainly makes sense.
