Rein sizes 54" X 7/8" meaning

[UKa]

Hey there, I need to buy new reins. When it says 54” X 7/8” or whatever does the 54 refer to length and 7/8 to the width?

And cheek pieces are they measuring the width by leather or the buckle? Thanks

 

[Dales]

Yes that's right. And all measured by leather not fittings

 

[UKa]

Brilliant thanks