It's a banana pepper,possibly the hot variety, or if you don't recall having hot peppers planted then it's just a regular banana pepper.

Thank you very much for your quick response. I have lots of hot peppers planted but there were at least 4 or 5 types. One was even supposed to be a Peter Pepper. But no evidence of that yet.

The one on the left looks to be a cherry pepper - sample to see if hot or sweet - I just pickled some yesterday.

cherry pepper and the other looks to be hungarian hot wax