Stopper for plastic carboy?

[ImNoExpert]

I just picked up a bunch of these and these during Northern Brewer's BOGO sale.

For those who have them, what size stopper or bung do you use? My glass carboy stoppers are too small.

 

[d3track]

Did you go to the bottom of the page.....
http://www.northernbrewer.com/shop/universal-bung-medium-fits-better-bottles.html

 

[ImNoExpert]

Yeah, but not sure if my LHBS carries that style. They do carry a stopper for better bottles but I was unsure if they share the same size opening.

I suppose I could measure and take that measurement along with me to the LHBS, but that would require me to get out of my chair. What am I training for the Olympics?!

I've also seen #10 suggested but wanted some input from the gang here.

 

[eastoak]

#10 works.