Earlier this month, Apple introduced the Apple Watch Series 6 and Apple Watch SE. The company also unveiled the new Solo Loop and Braided Solo Loop bands, a new design without a buckle or clasp.

Thanks to the design of the new bands, Apple has a new sizing guide for potential buyers. This is designed to help you pick the right size for your wrist, since it can’t be adjusted. Unless it’s by time, apparently. As first noted today by MacRumors, Apple has updated the support documents regarding the Apple Watch, and notes an important detail of the new Solo Loop.

According to Apple, the new silicone rubber Solo Loop may “increase in length over time”. This means that, with plenty of use and over time, the band may get looser on the wrist. Per the fine print on the support document:

Solo Loop may increase in length over time.

This does not appear to be the case for the Braided Support Loop, just the silicone rubber option.

This is definitely worth knowing, considering Apple suggests a “snug fit” for your Apple Watch. The correct fit isn’t just meant for overall comfortability, either. With the sensors baked into the smartwatch, a snug fit means more accurate readings.

Meanwhile, Apple has made another change for the Solo Loop band. Michael Steeber on Twitter said that Apple has updated its sizing guide today. The numbers (which start at 1 and go to 12) haven’t changed, but Apple is providing more detailed instructions for the process. New illustrations were added as well.

This is probably an important update for the sizing guide, because as we reported earlier this week, the wrong size means a whole return of the Apple Watch. So if you order an Apple Watch Series 6 with a Solo Loop or Braided Solo Loop band and it doesn’t fit, you need to return the whole Apple Watch to swap it out.

Did you order a new Apple Watch with the Solo Loop or Braided Solo Loop?