Exercise sheets - sizing?

[Acolyte]

Just wondered what sized exercise sheet I should be looking at for my 16.2hh SF gelding - he wears a 6'6" rug, and the saddle is a 17.5" one. The link which should tell me on the Derby House website isn't working! Thank you

 

[Acolyte]

And now the sizing guide on the Thermatex website won't work for me either - help!!

 

[RachelB]

http://www.tds-saddlers.co.uk/customerinfo.asp
Sizing charts - scroll down

 

[Acolyte]

Thank you! Did try Googling as well, but it didn't work very well for me