This Little Thing Had a Big Job

Source: Reddit
Take a closer look at a pair of vintage wool short or trousers. If you are lucky you will see a little tab located next to the front belt loop. A belt prong tab has a functional purpose (it is not just decoration).
The tab serves as a part of the thought process used by tailors during their design. It was meant to be able to catch the prong of the belt buckle. When this happened the tab would help the buckle stay directly over the middle of the waist band. This would create a neat and evenly fitted garment.
What Does the Belt Prong Tab Do?
The tab is usually found next to the first button or clasp on the front of the garment. At first glance the tab may seem like another loop that is not needed. However once you put the prong of the belt through the tab prior to placing the prong through the belt hole you will realize what the tab does. The tab will hold the prong in place so the buckle will not shift to one side. With the prong in place the belt will remain in the middle of the waistband and the overall appearance of the garment will have a clean, structured appearance.
Why Tailors Used It
During the early days of making belts they were stiff leather and the waist bands had no flexibility. When the belt buckle slid around to one side the entire fit of the garment would be ruined. The belt prong tab was a way for the tailor to ensure a consistent fit and to provide structure to the garment. Tailors incorporated the belt prong tabs into all types of trousers, shorts, and even knickers – especially into dress or sports styles in which the fit and appearance of the garment was important.
This is an example of a detail that was added to the garment to provide function while maintaining craftsmanship.

A Detail That Speaks to Craftsmanship
The belt prong tab is an example of a time when clothes were made with the idea of being able to last and work properly. Even casual clothing had fine details. In addition to keeping your belt in place, the prong tab also kept your garment aligned.
It did not draw attention to itself. It simply worked.
Why It Disappeared
As materials changed and production moved towards cheaper, less complicated ways to make garments, details like the prong tab became obsolete. The use of elastic waistbands and other stretchy type of fabric eliminated the need for the prong tab. As a result the end product was cleaner looking but lost some of the craftsmanship and design elements of earlier garments.
Spotting the belt prong tab on vintage shorts can be like finding a secret signature. It is one of those things that vintage enthusiasts find impressive. The belt prong tab is a reminder of how designers intended to make their designs both intelligent and intentional.
Next time you come across a tab on vintage shorts, try using the prong tab. Place the prong of the belt through the tab, center your belt and you will experience a piece of true classic men’s style design.