Custom Buttons Created for an eCommerce site

We are looking for someone to design several buttons for us in order to improve the conversion rate and usability of our website and checkout. We are looking for the following buttons - Proceed to secure checkout - Proceed to checkout - Continue shopping - Add to cart - Chat now (Live chat image) - Norton Secure button (custom size compared to the other buttons) - Phone number button - + a 1-2 other buttons as needed, Attached is the style of button we like for Chat now, phone and the size for Norton, but using our site colours Also the Green we like for proceed to checkout and add to cart Should be a pretty easy project, but we would like the option of revisions if we need too.