The 12 A123 pouch cells by themselves are just about 4 inches tall. With the end compression panels, the pack is almost 6" tall!
You can see the rounded slots for the tension bands to wrap around the entire package. The recommended compression pressure is quite high so specialized tools will be needed to do the banding.
Here's a ruler against the pack. It's about 5.75" tall. Each end panel is just about 1" thick and each is quite hefty.
I'll do more measurements of the dimensions and weight later.