How do i pick out the right promise ring for me ?

we had a talk and we for my birthday its december 23 and for christmas and our 4 month anniversey on the 28 want a promise ring i never had a promise ring before how do i find a low price sliver diamond thick band ring and we want our names on it and the date we started dating and hearts if they can i love sliver and hearts and things that are cute can you help me find the right ring for me