How to compare size and shape
Use the same measurement across models, then compare the base, curvature, and shape.
Overall versus insertable length
Overall length may include the base or the handle. Insertable length is a separate figure. If a product gives only one number without a label, check the manual or the exact variant before relying on it.
Width versus circumference
Width and diameter are measured across the body. Circumference is measured around it. A measurement at the widest point can differ from the width along the shaft, especially on a contoured design.
Base and bend
Check the size and shape of the base separately. For suction mounts and surface compatibility, see the suction cup comparison guide.