Grading Guide: Watermelon sizes | packs | criteria
Illustrated Criteria for USDA Fancy Watermelon

A USDA Fancy Watermelon is:

Mature

Similar Varietal Characteristics Fairly Well Formed
Seedless watermelon are watermelons which have 10 or less mature seeds, not to include pips/caplets, on the face of the melon which has been cut into four equal sections (one lengthwise and one crosswise cut).
Not Overripe (Above is over ripe)

A USDA Fancy Watermelon is free from these defects:

Whiteheart
Anthracnose Decay Sunscald Whiteheart
 
Damage by any means

Photos below illustrate categories of damage specified in the USDA Fancy criteria.

Check classification of defects for allowable limits.

two one three
Surface damage: rindworm, hail, transit rubbing, etc. Hollow heart Internal Rind Spot
   
Side Bruises End Bruise

C. Gunter and E. Maynard, Purdue University. 2006. Based on US Standards for Grades of Watermelon 1-15-78 reprinted 01-78. Page last revised 07-12-06.

This project made possible by financial assistance from Indiana's Office of the Commissioner of Agriculture, Value-Added Research Grant Program.