Horse blanket sizing usually goes by inches not feet. A large pony like a cob or a small horse will generally start at about a 70. This can vary depending on the build of the horse and the blanket manufacturer. Some tack stores will fit your horse for a blanket if you can bring him in a trailer. If that is not possible measure with a tape measure from the middle of the horse's chest all the way back between his back legs under the tail. Then add 4" to that measurement and that will give you a good idea of the right size. Check with the store your buying the blanket from, they will usually let you return the blanket for a different size providing its not dirty.
you would probably have to get the biggest size there is like 7`0 or 6`0 they are cob sizes for the rug
If a horse has worn a horse rug while being ridden, the rug should be lifted and removed and the horse should be brushed where the horse rug was worn. The rug should be place on something that would allow it to get good ventilation to air dry.
you would put a rug on a horse during cold, windy or wet weather or when the horse is sweaty/wet or being bothered by flies. you would put a stable rug on a stabled horse when it's cold, sweat rug on a wet/sweaty horse, a new zealand rug on a horse turned out at grass when it's wet/windy/cold and a summer/fly sheet on a horse being bothered by flies.
autumn
A cooler horse rug cools down a horse when it gets hot and sweaty.
if you have trained a horse and it is sweaty you would put a cooler on it, a thin fleece blanket
The rug is a warm thick waterproof, which will keep your horse warm. It will keep it dry also, to stop any risk of colds or worse.
There is no precise way to fold a horse rug it just needs to be clean and dry.
Horse rugs function the same way for horses that clothes function for humans. Because horses are warm blooded, they are affected by the climate. If it is too cold for the horse, a horse blanket will be put on the horse to keep it comfortable and to prevent it from getting sick.
The word rug usually means turnout rug which is a waterproof, durable blanket for the horse to wear outside in bad weather. Depending on what region you live in fall through early spring is rug season.
It depends on the cob and it depends on the winter. My horses live in California and they get turnout rugs. If you have severe winter weather where you live than it is probably a good idea to blanket him or put him in a stall during the worse of the weather. If you do decide to use a blanket you must stick with it until the spring brings milder temperatures. And it is alway a good idea to have an extra rug on hand. Especially when worn outside, horses tend to find anything at all to rip or tear their blankets on.
It needs to fit correctly, neither too big nor too small. If the blanket doesn't fit, it will rub the horse wrong and cause him pain, and if it rubs in the wrong place, you may not be able to ride him for a while. And if it rubs a place raw, that leaves it open for infection. So, get only a rug that fits your horse exactly.