Internal shoe size tester

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.

Applications

This instrument is widely used in polymer material production enterprises, printing and dyeing industries, textile inspection departments, research institutions, and textile colleges.

It is also suitable for performance verification of new product development, quality control in production departments, third-party testing institutions, laboratory product performance verification, and the determination of material properties by quality and technical supervision departments.

Standards

ISO 9407:2019 Footwear — Sizing — Mondopoint system of sizing and marking

SATRA TM362-2008：Method for assessment of abrasion resistance of shoe soles

ISO 11092:2014 ：Textiles — Physiological effects — Measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded-hotplate test)

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.

Technical Parameters

Test Procedures

Insert the flat steel bar into the shoe and push it to the toes;

Move the device vertically and position the curved rod at the point of maximum curvature of the heel;

At this point, the shoe size can be read from the scale;

Measurement complete.

 YouTube video introduction:https://www.youtube.com/watch?v=-uyYZ8-ksIg