GB/T 36936-2018Footwear -- Vocabulary of sizing (English PDF)

2.1 Foot size and shoe size footdimensionsandshoesizing

2.1.1

Foot centerline centrallineoffoot

The center axis of the foot connects the center point of the heel of the heel (heeling point) and the point of the foot.

Note 1. See Figures A.1c) and d), and Figure A.5b).

Note 2. There are two ways to determine the front end point.

Method 1. At the end of the second toe;

Method 2. At the midpoint of the footprint of the foot (2.1.15).

2.1.2

Design margins designalowance

The amount of excess in the forefoot portion of the last exceeds the effective length of the shoe (2.1.3).

Note. See Figure A.2.

2.1.3

Effective length of shoes effectiveshoelength

Feet length (2.1.4) plus toe allowance (2.2.16).

Note. See Figure A.2 and Figure A.3.

2.1.4

Foot length

The testee bare feet or wearing thin socks that do not significantly affect the size of the foot, maintain an upright position, and the weight is evenly distributed on both feet, measuring

The maximum horizontal distance from the center point of the heel of the heel (heeling point) to the foremost end of the toe.

Note. Foot length can be measured in different ways.

Method 1. Measure along the inner tangent (2.1.6), see Figures A.1a) and b);

Method 2. Measured along parallel lines of the central axis of the foot (2.1.1). There are two methods (Method 2a and Method 2b) for measuring the center axis, see Figures A.1a), c) and d).

2.1.5

Heel height heelheightofshoe

The vertical height of the upper end of the upper part of the heel to the ground.

Note 1. See Figure A.3.

Note 2. The height of the heel minus the thickness of the sole at the metatarsal toe is equal to "high after the shoe last" or "effective high" (2.2.6), see Figure A.8.

2.1.6

Inner tangent

A line that is in contact with the most prominent point on the medial side of the heel and the most prominent point of the first metatarsal.