They are small but just a little nudge for any eco interested friends you have. They sit on your kieyring which is very handy and are lovely quality and lovely to use. We all need to do what we can to help the enviroment so buy one thing and buy well. This little straw will last you for years, we have one each for the kids or us and they are perfect when out and about, also you dont have to remember to bring them as they are attached to your keys! Lovely gifts and very very useful!