Easy new Trail Hoof Shoe Size 1

Where do you put that you want a left or right. I need the set but wasn't to make sure I'm not getting two of the same side

Is this the price for a pair (2) or for just (1) boot??

Will these hold up when being worn all the time? I have a horse with soft soles and would like to get away from having her shod all the time

Is there a size chart ?