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How do Shell Opening Size and Shell Opening Shape relate to Crab Size.
Last Updated: 09/13/2009
This chart is intended to aid in demonstrating the relationship between different shell types and the size of crabs wearing them.

For example a customer may have a crab that is wearing a Sharkeye shell with 1 1/4" opening. This is a common size and would be a typical medium size crab. If the customer were to order the next size up of 1 3/8" but in a Turbo shell by looking at the chart they would see that a 1 3/8" Turbo shell is for a Large crab and may be too big for their crab. A 1" to 1 1/8" Turbo may be more suitable.

APPROXIMATE SIZE OF CRABS IN THEIR SHELLS
  • TEENY (dime)(1/2" or less)
  • TINY (penny) (3/4")
  • SMALL (quarter) (1")
  • MEDIUM (golf ball) (1 5/8")
  • LARGE (tennis ball) (2 1/2")
  • JUMBO (larger than a baseball) (3" or more )

TABLE SHOWING SHELL OPENING SIZE AND SHAPE
RELATED TO CRAB SIZE
 
OPENING SHAPE
OPENING
SIZE
Round Opening Elliptical Opening Oval Opening D-Shaped Opening
<1/4"
<6mm
TEENY
TEENY
TEENY
TEENY
1/4"
6mm
TEENY
TEENY
TEENY
TEENY
3/8"
10mm
TINY
TINY
TINY
TEENY
1/2"
13mm
TINY
TINY
TINY
TINY
5/8"
16mm
SMALL
SMALL
SMALL
TINY
3/4"
19mm
SMALL
SMALL
SMALL
SMALL
7/8"
22mm
MEDIUM
SMALL
SMALL
SMALL
1"
26mm
MEDIUM
MEDIUM
MEDIUM
SMALL
1 1/8"
29mm
LARGE
MEDIUM
MEDIUM
MEDIUM
1 1/4"
32mm
LARGE
LARGE
MEDIUM
MEDIUM
1 3/8"
35mm
LARGE
LARGE
LARGE
MEDIUM
1 1/2"
38mm
LARGE
LARGE
LARGE
LARGE
1 5/8"
41mm
JUMBO
LARGE
LARGE
LARGE
1 3/4"
44mm
JUMBO
JUMBO
LARGE
LARGE
1 7/8"
48mm
JUMBO
JUMBO
JUMBO
LARGE
2"
51mm
GIANT
JUMBO
JUMBO
LARGE
2 1/8"
54mm
GIANT
GIANT
JUMBO
LARGE
2 1/4"
57mm
GIANT
GIANT
GIANT
JUMBO
2 3/8"
60mm
GIANT
GIANT
GIANT
JUMBO
2 1/2"
64mm
GIANT
GIANT
GIANT
JUMBO
2 5/8"
67mm
GIANT
GIANT
GIANT
JUMBO
2 3/4"
71mm
GIANT
GIANT
GIANT
JUMBO
2 7/8"
73mm
GIANT
GIANT
GIANT
GIANT
3"
76mm
GIANT
GIANT
GIANT
GIANT


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