Black Self-Seal Flat Mailers

Yes! If you’re a first time customer looking to make sure our supplies are just right, please call or email us. We offer up to two samples at a creditable charge of $15. Keep in mind not all items are sample eligible. Sample orders take a little extra time to ship and are usually out the door within 48-72 hours

Items listed with a freight icon beside them will imply that those specific items are only available by selecting our flat rate shipping option as regular ground parcel rates wouldn’t be calculated. In most cases but not all this is due to the items being too large to ship via ground traditional methods and would require shipping via LTL trucking. In this instance when the flat rate is selected we will determine post order the best shipping method to fulfill the order – this can be a mix of ground parcel shipping with LTL, all LTL or even all parcel as this does not guarantee the actual shipping method LTL vs Parcel but would provide the absolute best shipping cost for any order when selecting the flat rate option.

All items purchased from TheBoxery.com may be returned in their original, unused condition within 30 days for a full refund of the purchase price minus shipping. Credit will be issued in the same form as payment received. Call 1-877-T-BOXERY(826-9379) to receive an authorization code prior to returning. Note: Customers will be responsible for shipping charges on canceled orders.

Measure the Length, Width and Depth (Height) of the object you are attempting to pack then look for the corresponding box size in this order.
1. Length
2. Width
3. Height
The box measurements will always reflect the inner dimensions with an 1/8'' +/- variance.

Each carrier will have its own dimensional dim divider but the method is the same. Take your package dimensions: Length x Width x height and then divide that by the dimensional divider (usually a number like 139-166) The carriers will then charge you based on the greater of the actual vs the dimensional weight.
1. Length
2. Width
3. Height
The box measurements will always reflect the inner dimensions with an 1/8'' +/- variance.

We carry three different box strengths.
1. Standard - With an ECT32 rating and a bursting strength of 200lbs, this box is recommended for up to 40lbs. It is the most commonly used shipping box.
2. Heavy Duty - Single Wall - With an ECT44 rating and a bursting strength of 275lbs, this box is recommended for up to 65 lbs.
3. Heavy Duty - Double Wall - With an ECT48 rating, a bursting strength of 275 lbs plus an extra layer of corrugation, this box is recommended for up to 80lbs.

We pride ourselves with recycling all of our used boxes and put a strong emphasis on the recyclable nature of our products site wide. All of our boxes are made with over 80% recycled material. Our mailers are made with 100% recycled fibers. As a general rule it is our goal to have an eco-friendly version within all of our items as an optional substitute.