Internal shoe size tester

Meet the standard:

ISO 9407

Product Introduction:

While external shoe size markings provide a general guide, the actual space inside a shoe dictates how it will fit a foot. The internal shape and dimensions are influenced by the last used, construction methods, and materials. An Internal Shoe Size Tester provides an objective way to measure the usable volume, primarily the length from the heel area to the furthest point in the toe box.

The tester typically utilizes a probe mechanism designed to be inserted into the shoe. This probe can extend and adapt to reach the extreme internal boundaries of the shoe's length. The instrument then measures the distance between a defined point in the heel area and the furthest point in the toe area accessible to the foot. Some testers use a simple mechanical probe with a graduated scale, while more advanced versions employ digital sensors or encoding systems for greater accuracy and ease of reading. Sophisticated testers might even use multiple probes or scanning technology to measure internal width, height, and overall volume.

The instrument is used by:

Shoe manufacturers for quality control, last development, and sizing consistency checks.

Footwear retailers and fit specialists for assessing the actual internal size of shoes.

Footwear technologists and researchers for studying shoe fit and comfort.

Testing laboratories evaluating footwear performance and sizing accuracy.

Product Advantages:

Provides accurate and objective measurement of the actual space available for the foot inside a shoe.

Essential for ensuring consistent sizing and comfortable fit of footwear.

Helps identify variations in internal sizing due to manufacturing processes or materials.

Allows for direct comparison of internal sizing across different shoe styles and manufacturers.

Useful for quality control in shoe production and for improving last design.

Aids in selecting the correct shoe size for individual feet.

Product Features:

Probe mechanism designed to be inserted into the shoe, capable of reaching the heel area and the furthest point in the toe box. Probes may be articulated or flexible to navigate the shoe's internal shape.

Measurement system to accurately determine the distance between the heel point and the toe point. This can be a mechanical scale, a digital encoder, or other precise distance measurement technology.

Digital display to clearly show the measured internal length (and potentially other dimensions).

Mechanism to ensure the probe consistently reaches the absolute furthest point in the toe area and accurately references the heel point.

Design compatible with inserting into and measuring the internal dimensions of a range of shoe types, styles, and sizes.

Durable construction suitable for regular use in a manufacturing or laboratory environment.

(For more advanced testers) Capabilities for measuring internal width, height, or even performing a basic internal scan for volume.