Rug size for 10.2hh shetland?

At a guess 4'3 or 4'6 depending on build & rug brand. Just measure it. But, its not advisable to rug over rain scald, the warmth & lack of air make it worse. It's better to bring in overnight/ during the day to dry off if its rainy, & treat it before rugging.
 
My 3yo is only 1/4 Shettie, he is quite fine, about 10.2hh and has a 4ft3 rug. His full sister is more of a chunk, she is about 11.1hh and has a 4ft9.
 
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