Virgin queen bees have not yet fully developed their reproductive system and therefore are somewhat smaller than mated queen bees.
Virgin Queen Bees - Wildflower Meadows
BreedingBEST Protocol
Seasonal variation in defense behavior in European and scutellata-hybrid honey bees (Apis mellifera) in Southern California
Wildflower Meadows Queens Inspections Part 1 of 2 S5E41
Honey bee drones hi-res stock photography and images - Page 6 - Alamy
In the Hives
Bee Guardian Honey - featuring Eldorado Gold Sunrays Harvest - BackYardHive
Native Bee Banquet Wildflower Seed Mix
Supercedure Combine and Hive #3 Reduction S45E39
Millis Meadows Honey
Marked Queen Bees - Wildflower Meadows
Queen Bee Genetics Archives - Wildflower Meadows
Beekeeping - Wikifarmer