Citrus fruit size specifications :

Clementines

Size Code Diameter (mm)
1xxx 78 and larger
1xx 67-78
1 ou 1x 63-74
2 58-69
3 54-64
4 50-60
5 46-56
6 43-52
7 41-48
8 39-46
9 37-44
10 35-42

Mandarins

Size Code Diameter (mm)
1xxx 78 and larger
1xx 67-78
1 ou 1x 63-74
2 58-69
3 54-64
4 50-60
5 46-56
6 43-52

Oranges

Size Code Diameter (mm)
0 92-110
1 87-100
2 84-96
3 81-92
4 77-88
5 73-84
6 70-80
7 67-76
8 64-73
9 62-70
10 60-68
11 58-66
12 56-63
13 53-60

Source : Rules (CE) N° 543/2011 the commission 7 June 2011