So after a couple yoga workouts I definitely need blocks. Do they come in different sizes or lengths or anything? Do I need more than one? I don't know anything about them. Oh, I'm 6'1 and not very flexible at all, if that makes a difference. I can't wait for that to change. The flexibility, not the height.

There are some different size choices out there.
Check out: www.yogaaccessories.com/Foam-Yoga-Blocks_c_1166.html

I don't have one though I could make use of one. I happen to use a small Rubbermaid-type tub container that is near my workout area. So you don't HAVE to have a yoga block to get support.

I use the box that the p90x dvds came in, works great. Another option are books.... Just my .02! I didnt want to spend the money on blocks when i had enough of them laying around!

the other alternative, if you already have them, are your push up stands. they double as a yoga block nicely. only thing is that, if you're less flexible, then you may need the block, as the stands arent as high as the block in "portrait".

The harry potter hard back books make excellent yoga blocks...

Wow, I never would have thought of some of those. Yoga blocks are really nice though. They're squishy and light and easy to move around while in a pose without messing your balance up. I just went to my local sporting goods store and bought one.

I love it and my wife keep stealing it from me when we do Yoga together. Of course she uses it to stretch further and I use it to support my not quite there poses.