Cobra Measurements

The specifications on this page are meant as a reference to help you compare between sizes. We do not recommend choosing a size based solely on these numbers. For help with choosing a size, please refer to our Cobra size guide or email us at support@kink3d.com.

Gap measurements for each cage and ring combination can be found on our gap measurement page for Cobra.

Baby Cobra	Cobra S	Cobra R
Cobra N	Cobra S+	Cobra R+
Cobra N+		Cobra BFG

Baby Cobra

Cage	Length	Entrance Width
Narrow	35 mm	27 mm
Standard	40 mm	32 mm
Wide	45 mm	36 mm

Note: The Baby Cobra is an "all head" geometry. This means its entrance and head ring are fused, so these two measurements are the same. Plus, unlike other Cobra sizes, it doesn't have a flared head shape, so there isn't a separate head width. Therefore the Baby Cobra has only one total width measurement.

Please refer to the Baby Cobra product page in your preferred color to learn more about its shape.

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Cobra N

Cage	Length	Entrance Width	Head Ring	Head Width
Narrow	50 mm	30 mm	28 mm	31 mm
Standard	50 mm	32 mm	N/A	35 mm
Wide	55 mm	35 mm	N/A	39 mm

Note: The Cobra N in Standard and Wide versions is an "all head" geometry. This means its entrance and head ring are fused, so these two measurements are the same.

Please refer to the Cobra N product page in your preferred color to learn more about its shape.

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Cobra N+

Cage	Length	Entrance Width	Head Ring	Head Width
Narrow	60 mm	32 mm	30 mm	34 mm
Standard	60 mm	36 mm	32 mm	35 mm
Wide	60 mm	37 mm	35 mm	39 mm

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Cobra S

Cage	Length	Entrance Width	Head Ring	Head Width
Narrow	70 mm	32 mm	32 mm	35 mm
Standard	70 mm	37 mm	33 mm	37 mm
Wide	70 mm	41 mm	37 mm	40 mm

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Cobra S+

Cage	Length	Entrance Width	Head Ring	Head Width
Standard	80 mm	37 mm	33 mm	37 mm
Wide	80 mm	41 mm	37 mm	40 mm

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Cobra R

Cage	Length	Entrance Width	Head Ring	Head Width
Standard	90 mm	37 mm	33 mm	37 mm
Wide	90 mm	43 mm	37 mm	40 mm

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Cobra R+

Cage	Length	Entrance Width	Head Ring	Head Width
Standard	105 mm	38 mm	35 mm	39 mm
Wide	105 mm	43 mm	39 mm	42 mm

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Cobra BFG

Cage	Length	Entrance Width	Head Ring	Head Width
Standard	120 mm	40 mm	37 mm	40 mm
Wide	120 mm	43 mm	40 mm	43 mm

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Legacy Cobra Sizes

Cage	Length	Entrance Width	Head Ring	Head Width
S 1.05x	70 mm	38 mm	35 mm	39 mm
S+ 1.05x	80 mm	38 mm	35 mm	39 mm
R 1.05x	90 mm	40 mm	35 mm	39 mm
BFG (2020-2023)	115 mm	40 mm	37 mm	40 mm