How to read chastity cage dimensions and size charts

A cage dimension is useful only when you know what was measured. Match the part, direction, endpoints and unit before comparing two numbers. A front-plate measurement and an internal length answer different questions, even when their values are close.

This guide explains how to read product specifications. Choosing a suitable size also requires model-specific fit information; a unit conversion cannot make that decision.

Keep these measurements in separate fields

• Overall length or depth: the outside end-to-end measurement; check whether it includes the ring, connector and lock
• Internal length: the space inside the enclosure; look for marked start and end points
• Internal width or diameter: the measurement across the inside; an oval opening may need both width and height
• Ring dimension: check whether the number describes the opening, outside edge or another reference
• Gap or spacing: identify the two surfaces and assembled configuration being measured

Keep a plate width or ring-bar thickness in its own field. Circumference, measured around a shape, is also different from diameter, measured across a circle.

A real example: three Super Soft Cobra sizes

The Super Soft Cobra listing separates external span from opening. Its current specification table gives these measurements:

• Small: external span 59 mm; opening 36 mm
• Medium: external span 77 mm; opening 38 mm
• Large: external span 87 mm; opening 40 mm

These are not usable inner-length measurements. In the diagram, the long dashed line runs beside the outside of the cage, while a separate line crosses the opening. Neither should be renamed “internal length” when comparing this model with another one. The product listing also states that hand measurements may vary by 1 to 3 mm; retain that qualification with these figures.

The same listing separately names six base-ring sizes: 40, 44, 48, 52, 56 and 60 mm. Keep those in a different field from the cage opening. A matching number in two fields does not mean the parts or measurements are interchangeable.

Keep comparisons in one unit

This guide uses millimeters (mm) for product dimensions. If another listing uses inches, convert those values to mm before comparing them. NIST defines one inch as exactly 25.4 millimeters, so multiply an inch measurement by 25.4.

A conversion changes the unit, not what was measured. It cannot turn an outside span into an internal length. Extra decimal places from a calculator also do not mean the original measurement was more precise. Keep the source value in your notes and retain any stated tolerance rather than presenting a rounded conversion as an exact measurement.

Can you compare two cages by their size names?

No. Small, Medium and Large are labels within a product range, not universal dimensions. A front-plate width, an outside length and an internal length also describe different features. A similar number does not make them interchangeable.

Start with two selected variants. Compare only measurements with the same definition and units. If one listing gives internal length and the other gives only overall length, mark that comparison as unresolved rather than subtracting an estimated wall thickness.

Is ring diameter the same as circumference?

No. Diameter runs across a circle through its center; circumference goes around it. A 45 mm diameter label does not mean a 45 mm circumference. Also check whether the diagram measures the inside opening or the outside of the ring. These definitions explain the specification; they do not establish which size is suitable for a person.

What if the photo and specification table disagree?

First check the selected variant, measurement units and whether the same part is being shown. Then check whether one number was rounded or refers to a different assembled configuration. Do not silently pick whichever value looks more convenient. Record the discrepancy and ask which source applies to the exact variant.

If the arrows or variant mapping remain unclear, ask for confirmation before using the number to choose between products. A generic photo is not a substitute for a labeled drawing of the exact option.

Save a useful specification note

For each number, record the model and variant, published value, label, source and any unresolved question. For example: “Super Soft Cobra, Small; 59 mm external span and 36 mm opening; product specification table and size diagram; not an internal-length specification.”

Ask product support for a drawing of the selected variant with arrows and units. Once both products use matching definitions, the numbers become a useful comparison instead of a misleading shortcut.

A short question you can send to support

“I am comparing [model and variant] with [model and variant]. Does the listed [number and unit] describe the internal opening or the outside dimension? Please confirm the measurement endpoints and which diagram corresponds to this variant.”

Before comparing two listings, check: same part, same measurement direction, same endpoints, same unit and the correct selected variant. Leave missing information blank until it is confirmed. A photo can clarify the shape, but perspective and display size cannot supply an unlisted dimension.