The proper way to measure the seat size of a Sports Saddle is to
measure between the cantle and the pommel at the nearest points
and add 6 inches. Don't include the trim rolls in your measurement.
So, if you measure 9½ between
the two nearest points, not including the pommel and cantle trim rolls, add 6 inches,
resulting in a 15 ½ seat. Easy once you know the formulae.
Take a close look at the white line between the cantle and pommel
in the photo below.
IF YOU ARE TRYING SOMEONE ELSE'S SPORT SADDLE PLEASE READ BELOW!
If you have a SS or are currently trying someone else's then do yourself a BIG favor and measure that saddle for its actual size. Do not go by what the owner says it is. This will be very helpful because if that saddle is a pretty good fit for you and you want to order one the same or similar size then you must know exaclty what size the saddle is that you are trying.
Seat
Size Calculator (enter all values
for seat size)