The thickness of the bands ranges from light, medium, and heavy. I feel these bands would work great for your arms and legs since there is enough range of motion when you're stretching them. I find the length of the bands to be decent.
I noticed the light band was more on the "extra, extra light side." When I did several standing up type workouts, the bands would not stay in place so they would slip or roll-up, especially for the light and medium bands. I believe that can be common when using a latex type of material. On the plus side, they are easy to clean. I did look at getting fabric type resistance bands, but I imagine that sweat will cause them to stink up and require one to throw it in the washer or be hand-wash.
Overall, I find that I use these resistance bands for doing Pilates, yoga, or other basic workouts. If your a starter in using resistance bands, these would do the job.

Bands work as described. Comfortable to use.

Very satisfied with these rubber bands for my daily physical therapy workout

I have been using these for a few months now. I use them 2-3 times a week. I have tried all three and each works well for a different exercise depending on the resistance I need. I'm satisfied with them.

These bands are good for the price you pay, however, they do roll if they are just on your skin. I notice they also roll if my workout pants are slick and not a thicker cotton material. They do provide a good resistance and they are definitely durable. They are stretchy and do what they need to in your workout.

Excellent product; fair price.

The great colors and brand name attracted me. However, these just roll up no matter what type of movement you are doing. Gaiam needs to make improvements on these. They fail as a fitness staple for me.

These bands are nice and wider than most but the light band snapped after the first week! The heavier ones seem to be doing well.