Apple watch

No way for us to know either.

Does she like small watches, or larger watches?

The only difference between the 40 and 44mm is the physical size of the watch.

Dimensions:

40mm

• Height: 40mm (1.57 in)
• Width: 34mm (1.34 in)
• Depth: 10.74mm (0.42 in)

44mm

• Height: 44mm (1.73 in)
• Width: 38mm (1.5 in)
• Depth: 10.74mm (0.42 in)

Apple Watch Series 5 - Technical Specifications

Unless she has a large wrist, I would suggest the smaller of the two sizes. I have a daughter that just completed graduate school with her M.Ed, and she has the smaller size.

You're welcome.