Greengage fruit are identified by their round-oval shape and smooth-textured, pale green flesh; they are on average smaller than round plums but larger than mirabelle plums (usually between 2 and 4 cm diameter). The skin ranges in colour from green to yellowish, with a pale blue “blush” in some cultivars; a few Reine Claudes, such as ‘Graf Althanns’, are reddish-purple due to crossbreeding with other plums.