Choosing a penis extender can be a daunting task, as there are many different brands and models on the market. Here are some factors to consider when choosing a penis extender:

1. Quality and safety: Look for a penis extender that is made from high-quality, medical-grade materials and has been rigorously tested for safety and effectiveness. Check to see if the device has been certified by regulatory agencies like the FDA.
2. Comfort: The penis extender should be comfortable to wear for extended periods of time. Look for a device with adjustable settings that can be customized to your individual needs.
3. Traction force: The amount of traction force applied by the device can impact the results you achieve. Look for a device that provides a sufficient amount of traction force to promote growth, but not so much that it causes pain or discomfort.
4. Size: Penis extenders come in a range of sizes to accommodate different penis lengths and girths. Make sure to choose a device that is appropriate for your size.
5. Customer reviews: Look for customer reviews and ratings to get a sense of the experiences other users have had with the device.
6. Price: Penis extenders can range in price from less than $50 to several hundred dollars. Consider your budget and the value you place on the potential benefits when choosing a device.
7. Customer support: Make sure that the company behind the penis extender provides good customer support, including a warranty or guarantee, to ensure that you are satisfied with your purchase.