It's bigger than a pillow cover and may be more expensive than an average one but it is a breathable bag. Because of its size you should only buy it if you have multiple onaholes or a large hip onahole. Use an average pillow cover for reference if your unsure if you want a bag this size.
A really big bag designed for hips and torsos.
Alot bigger than the other extra large bags up for sale.
I would say this bag is about the size of a pillow case.