Go to: http://www.aslpro.com/cgi-bin/aslpro/aslpro.cgi
Click on 'L' and then click on 'large.'
You can also click on 'B' and then click on 'big', but I like the way the first woman mouths it (mouths it, is that the right way to express that???) better.
ETA: I think I'm one of the slowest typists on AD! I was going to delete my post but I'll leave it up. This is one of my favorite sites because I like the way the video has a slide so you can slow it down. I find it comes in handy when I'm trying to figure out how to copy some of the signs.
