50#4 9.5x14.5 KRAFT BUBBLE MAILERS PADDED ENVELOPES #4 50 - #4 - 9.5&quot; x 14.5&quot; (9.5&quot; x 13.75&quot; usable space) Our bubble mailers are laminated to a 55 lb Kraft paper and have bubble that runs all the way to the flap.