The chair was too low to use for my work, but the extenders made it perfect.

These extenders were easy to install and work as expected

These extenders made my new yoga ball chair perfect for me at my desk

Great extenders

The extenders are perfect, just what I needed to use the chair at my work desk and very easy to nstall!

Probably wouldn't have needed the extenders, but they work great

very unhappy only received 1 extender and it should be 4

these extenders are great, thank you.

As she is short the extenders would be exceptionally helpful.

Nothing to do with the number of legs versus the number of extenders is mentioned in the item description of the chair it does however pop up as "other customers have purchased" or as recommened...it just seems that you wouldnt recommend a four leg extender set for a five legged chair