We have a been vine in the backyard, and are wondering if it's good to eat.
The ruler is in cm, not inches.
The plant looks like wisteria to me. Hard to tell since the plant has mostly lost its leaves in the picture and doesn't have flowers. You may want to look at wisteria pictures online and compare them to what your plant looks like in the summer.
Unfortunately, wisteria beans are poisonous, so don't eat.