Recently interested in bodyweight exercises, and came across https://en.wikipedia.org/wiki/Parallettes:paralletes to help develop strength and for progressions to more complicated bodyweight exercises.

There does not seem to be a standard size for paralletes. They tend to come in two main types:

1. a shorter (and usually lower) 'mini' version
2. a longer version

American Gymnast recommends one with shoulder width length, height of about 7 inches, and bar diameter of about 1.5 inches. The article suggested that lower bars make it safer and more stable. Their own paralletes have these dimensions:

1. 1.5″ diameter solid maple bar
2. 24″ long
3. 7″ high
4. each base is 11″ wide

Rogue offers a parallete made of a 14G single piece tubing that is higher at 13.5“ but otherwise similar to the previous one (23.5” length, 14.5” width, 1.5” diameter). Rogue is a brand popular amongst cross-fitters, so I guess it would be suitable for that use.

Movement First offers a paralette similar in dimension to Rogue Fitness. The bar diameter is not stated though.

https://www.youtube.com/watch?v=Q3D7eWdkctw provides good videos for parallete exercises. What I like about the video it shows that it uses both low and high paralletes and demonstrates use cases for both.