The American Daffodil Society maintains a "Suggested List of Miniature-Sized Daffodils".

A miniature single floreted cultivar normally possess a flower less than 50 mm (1.97") in natural spread.

For a multi-floreted miniature daffodil the guideline measurement for the floral mass is 72mm (2.83") in natural spread.

The ADS requires show exhibitors to enter miniature daffodils only in classes for specific for miniatures.

Any named, numbered, or species daffodil which appears graceful, with all its parts proportionately small, may be exhibited in Miniature classes and is eligible for all ADS awards