Tetragnatha. They are commonly found in gardens and tall grassy areas. These garden variety long jawed orb weavers do not grow very large....maybe 1 inch or a bit more in length (with legspan).
Some species of Long-Jawed Orb Weavers can reach gigantic proportions. These larger species typically live near water and may reach lengths up to 4 inches or more (with legspan).
They are harmless to humans and provide great insect control. They are amazing to look at...just look at the overly long legs on this specimen. They are capable of elongating their body on a blade of grass and all but disappearing hidden flat against the blade.
These are one of my favorite spiders, most especially these long impressive species. Look for the messy webs near the waters edge.