1/64 inch

mm

Classification

Central America and Mexico

Colombia

Africa and India

20

8

Very Large

Superior

Supremo

AA

19.5

7.75

19

7.5

18.5

7.25

Large

18

7

A

17

6.75

16

6.5

Medium

Segundas

Excelso

B

15

6

14

5.5

Small

Terceras

C

13

5.25

Shells

Caracol

PB

12

5

11

4.5

Caracolli

10

4

9

3.5

Caracolillo

8

3