Hi, I recently requested the weight of the bubble mailer for adding information to my Shopify site. I needed it to know how much it was gonna cost me to ship my product plus the mailer. Just wanted to make a recommendation to add this information to your website for each of the sizes. If it helps, I discovered the weight for the 5X9 bubble mailer is 0.35 oz and this weight for the 7.5 x 10.5 bubble mailer is 0.61 oz. Hope that helps! Natalie Peyton