If my refund was mailed 02/07/15 when will I get it in the mail?

You can use the online tool at the IRS website below, to check the status of your paper-filed return. However, you should wait about four weeks to check.

https://www.irs.gov/refunds

Unfortunately, no one can tell you that. It will get there when the USPS delivers it and no one can tell you when that might be.