Amazon has the well-reviewed PrepSolutions 9.5" Compact Microwave Multi-Mat (Gray) for $6.39 - $0.96 off coupon (check "Apply $0.96 coupon") = $5.43 with free shipping on $35+ or with Prime.  Protects your hands when lifting hot dishes, can also be used as a splatter guard, jar opener, hot pad, trivet or utensil rest.