ABI Jubilee Viceroy Awning Size

Hi, I have an ABI Jubilee Viceroy 1998. I have purhcased an awning which is Size 11 but seems to big?

On researchng the internet it advised an awning size of 930. I purhcased a Size 12 dorema, which turned out to be a Size 11 Sunncamp prestige but it seems to big? The peggling at the bottom does not seem tight enough to me. 

Has anyone one of these caravans, if so what size awning did you have?

any help appreciated.