Jim, they're about 10.5" long. These tools work regardless of the water level. The purpose of them is more for accuracy of trimming/planting, then to keep your hands dry.
krisw wrote:Brian, GWAPA has some of these (see picture). They're available at our cost which is $18. Let me know if you'd like me to bring any to the next meeting.
This is a pretty cool set. I purchased one on the group buy. Use it on my pets daily.