I have used a Doc Johnson Ball Shape Anal Butt Plug Medium for a while and very happy with it 7.5 inch circumference.
http://www.lovehoney.co.uk/product.cfm?p=21069
Has anyone any suggestion on the plugs to use to go the Large version 8.75 inch circumference ?
Hmm you're going to need a lot of paitence and training I think!
You would be best considering an 8 such as http://www.lovehoney.co.uk/product.cfm?p=25813
this is quite interesting too... http://www.lovehoney.co.uk/product.cfm?p=17540
The 1st one you mention is similar to a Tantus Severin that I can now use.
The 2nd one looks interesting :)
The second of those seems like a good idea for graduated training.
Now added to my wishlist.
I am sure it will not be too long before I give in and buy it!