- A numerical system for sizing eggs originally ranging from size 1 (greater than 70 g) to size 7 (less than 45 g). The standard egg used in recipes is size 3, weighing 60 to 65 g (2 oz). The system in the UK has recently been changed to small (minimum weight 45 g); medium (minimum weight 55 g); large (minimum weight 65 g); and extra large (minimum weight 90 g). The standard 65g (2 oz) egg size in this system is medium.
- US egg sizes are jumbo, extra large, large, medium and small