Welcome to STEMerch!
The Incredibly Unrigorous Engineering Watch
The silver band and black band variants are adjustable
The variant with the dark face background has a slightly larger face and has a stretch band which simply stretches to fit your wrist.
Estimated shipping time: 4-5 weeks
Use discount code "TIME" to get a discount at checkout when you purchase a clock & watch.
Instructions on how to adjust the silver band watch here: https://youtu.be/_sKnDS8Uz90?t=48