Small enough not to be a nuisance. The most comfortable watch I've ever had! I like the alarm function. I can set an alarm for 1, 3, 5, 10, 15, 20 or 30 minutes very quickly. Being a mom is great for remembering things. Seems really well done. If you can't read this watch, you should probably wear glasses. The leather strap is amazing and doesn't make me sweat like the synthetic ones.