What is the physical dimension commonly associated with the pin tumbler type padlocks?

Pin tumbler type padlocks are most commonly associated with a shackle height of 1 1/2 inches. This measurement provides a good balance between security and usability, making it a standard size for various applications. The 1 1/2 inch dimension allows for adequate clearance on items such as gates, doors, and hasps, facilitating a secure fit while also being versatile enough to accommodate a range of locking needs.

The other dimensions, such as 1, 2, or 2 1/2 inches, do exist but are less common or are tailored for specific applications rather than being representative of the majority of pin tumbler padlocks available on the market. By standardizing around the 1 1/2 inch size, manufacturers can provide a product that meets the typical requirements of consumers, balancing security with ease of use.