Pea Shoots - are these "large" or "small"?

i have some pea shoots I bought on a whim at the 4th St food coop. And now that I tried to put them in a smoothie, i am a little underwhelmed.

I've been searching how to cook them and it looks like there are two kinds, large and small, large can be used in stir fry without de stemming while small needs the leaves picked off.

Can anyone tell me if the following pictures are "large" or "small" kind? these all look like the ones i bought (sorry i didn't take a pic of them).

Not sure if mine are just tough and really need the stems off, or if I'm just not used to the taste!