Based on published listings, not hands-on testing.
Why consider it
Sasttie's 20-inch donut is a candidate for a small dog who naturally curls into a circle. We'd measure the inner nest rather than use outside diameter as sleeping space.
What could make us pass
The rim consumes much of a small donut's footprint. Choose a larger style if the dog sleeps with legs extended.
Fit and care
Measure the well inside the surrounding rim. Outside dimensions include the walls, so compare the resting space with the dog curled naturally. Check whether washing means a removable cover or the entire filled bed.
Size evidence still needed
This model remains available for research. We do not substitute outside or nominal dimensions for usable inside space, so it is not in measured-size recommendations.
