So that shoes fit!
Shoes that are too short can damage feet. If the sensitivity in the feet is disturbed (e.g. with diabetes), a health chain reaction.
 
How the "Ruler for measuring the size of shoes and feet" works (see pictures)
1. Measure feet
Stand on the "Ruler for measuring the size of shoes and feet" and measure both feet.
The ruler automatically adds 12 mm to this (a value of 250 mm means that the foot is 238 mm long and requires shoes with an inner length of 250 mm). Note the millimeter value of the longer foot.
2. Measure the inside length of the shoe. Put the ruler in the shoe and extend it.
Note millimeter work*.
3. Does the shoe fit?
If both values are the same, the shoe fits (e.g. foot = 250 mm, shoe = 250 mm).
* minor deviations are possible!
 
Measure feet with ruler for measuring the size of shoes and feet
ruler for measuring the size of shoes and feet automatically adds 12 mm to the foot length when measuring feet. That is the minimum margin for suitable shoes.
Example: A value of 250 mm means that the foot is 238 mm long and requires shoes with an inner length of 250 mm.

Example: A value of 250 mm means that the shoe has an inner length of 250 mm.
Length isn’t everything
It can happen that shoes are long enough in terms of the inside length, but do not fit around the ball of the foot and the heel. Tip: The only thing that helps is to switch to another model. Shoes are mass-produced and not every shoe fits every foot.
 
The problem with shoe sizes
Shoe sizes are not standardized and are therefore rarely correct. Our research shows that around 90% of shoe sizes are wrong and that the inside of the shoes is almost always much shorter than it should be.
Example: If your shoe says size 42 and the measurement with the plus12med only shows size 40, then that is – unfortunately – completely normal.
To check: Check the shoe size with the "Ruler for measuring the size of shoes and feet" or make a cardboard strip of the appropriate length. 1 EU shoe size is 6.67 mm. An EU size 42 shoe should therefore have an inner length of 280 mm (42 x 6.67 = 280 mm).
1 UK shoe size is 1/3 inch (8.46mm). So a UK size 8 shoe should have an inside length of 11 inches (279.4 mm)
Tip: When measuring feet and shoes, use the millimeter scale as a guide and only use the shoe size scale to look at the craftsmanship of shoe manufacturers in amazement …
My shoes fit!
In an exciting series of tests, we were able to prove that children are usually absolutely convinced that they are wearing suitable shoes. Even if the shoes are much too short. It’s similar for adults: if you always wear shoes that are too short, it feels completely normal. And so most adults believe that their shoes fit perfectly.
Take the test: Either with the "Ruler for measuring the size of shoes and feet"or you can make a cardboard strip that is 12 mm longer than your foot and insert the strip into the Shoe. If the strip bends up, the shoe is too short.