Record Mailers These are not your mom's record mailers. We make them larger, whiter and brighter. Our Ultimate 45 mailer ships from 1-15 45s using our expandable die-cut boxes. Need a versatile LP mailer that looks great? Our LP mailer holds 1 to 12 LPs and the bright white finish always looks smart and professional. Roomy 13 x 13 folded size expands from 1/2 to 2 inches deep using four 1/2 inch perforations. Be sure to get some pads to keep your mailing safe.