Can anyone help with any knowlegde of SJAI?

[paddywak]

Hiya have just got my horses print out and am baffled by the classes and have found it impossible to find the actuall heights lol so i would be very grateful if someone would be kind enought to tell me how big
148 D
148 CD
148 BC
148 5/6/7yr olds
148 ABC

Any help would be great!
thank you !!! x

 

[luane1]

148 D 90cms
148 CD 1m
148 BC 1.10/1.15
5/6/7 1.10/ 1.15,
148 ABC 1,15
148 AB 1.20/1.25

Speads should be 10cm on these heights