Are contributions to a SIMPLE IRA the same as contributing to a Traditional IRA?

Box 12a on my W2 has an "S" designation for contribution to a 408(p) SIMPLE IRA. The amount exceeds the annual allowable limit for a Traditional IRA, but I think this includes my employer's match. Wondering if this is, in fact, a Traditional IRA and whether I should deduct my employer match before entering the amount.