I think they come in sheets of 30 possible double sealed, but this is based on my research not 1st hand...
Here is what they look like in sheets of 30 and as individual coins: http://forums.silverstackers.com/topic-9307-silver-panda-monium-1oz-2011-silver-pandas.html
They used to come in double sealed sheets of 10 (although there were exceptions). Now the coins are sealed only in capsules as shown by yennus. Best wishes, Peter Anthony http://www.pandacollector.com
The ones i have seen come in masterpacks from 600 pcs ( 20 x 30pcs ) 30 are into one sealed plastic sheet ( 5x 6 quarter ) and each one is already capsuled. This packages are since 2008. They 2007 and 2006 ones came in sealed plastic sheets ( round ) with 15 pcs. Earlyer years i have seen came in sheets of 10 ( 2 x 5 )