These are made from long lasting (supposedly 7 years) vinyl to withstand everything the weather can dish out!
Measures approximately 3"x3".  External application is ok.
Please note application instructions included here in photos.
FYI:If you are ordering from outside of the US, the shipping charge does not include any coverage for paying Duties upon arrival in your country.The shipping that we charge is what it actually costs us to send to you.Thanks for your understanding.