Twitter-icon.com has a great selection of twitter icons and buttons.
Site: greenidealab.com (Green Idea Lab:Green Buildings,Green Building Architects,Green Architecture,Energy Efficient Buildings,Green Building Consultant | We offer: Green Building Design & Retrofit Solutions, POE Expertise, Eco-Scaping Consultancy, IEQ Evaluation, Waste Management)
Do you have a twitter account? If so it's important
to get as many people as possible to follow you.
Great follow me icon captures attention of the visitors
and brings more followers to your twitter account.
Choose great twitter icon for you website!