Global Equipment Company Inc. sells shipping boxes throw their website. Their URL address is http://www.globalindustrial.com. Thir prices are very reasonable compaired to local office supply stores.
Small shipping boxes can be found in a multitude of places, both on the internet or in physical stores. Many websites, such as Staples, OfficeMax and Amazon have very reasonably priced small shipping boxes. Also, most office supply stores and post offices will have small shipping boxes available to purchase.
The USPS offers shipping boxes for it's customers. These are available for free on their website.
It’s more environmentally friendly to reuse boxes than to buy new ones. I know a lot of people give their boxes away on BoxGiver
Staples.com has a large selection of small sized shipping boxes. Another place to look would be OfficeMax.com who has a great variety of shipping box sizes.
A lot of companies provide customized boxes for shipping, but this won't be the honest answer. A lot of those companies do not actually exist, they are scammers. Then there are those do not scam, but they outsource your order to some real company, get away with your money and all you get is a bulk of substandard shipping boxes. Then there are those who delay shipments, apply a lot of hidden charges or provide poor quality boxes. I use PackagingBlue.com for my tees business and they are the ones I would like to recommend.
form_title= Shipping Boxes form_header= Keep items protected with shipping boxes. What size boxes do you need?*= {Small, Medium, Large} How many boxes do you need?*= {1, 2, 3, 4, 5, More than 5} Do you want any package protectors?*= () Yes () No
form_title= Discount Shipping Boxes form_header= Get a discount on your shipping boxes with help from experts. How many boxes do you need?*= {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, More than 10} What size boxes do you need?*= {Small, Medium, Large, Mixture} Are you shipping fragile items?*= () Yes () No
That sizes that shipping boxes are usually available in small for some electronics, mediums for larger electronics, large for stacks for books and extra large.
11 cartons total
form_title= Wholesale Commercial Shipping Boxes form_header= Save money when you buy shipping boxes in wholesale. How many boxes do you need?*= {10, 20, 30, 40, 50, 60, 70, 80, 90, 100, More than 100} What size boxes do you need?*= {Small, Medium, Large, Mixture} Do you want plastic, cardboard or metal boxes?*= {Plastic, Cardboard, Metal, Not Sure, Mixture}
Amazon won't ship to PO boxes due to "Geographic Restrictions". They do allow small packages though, sometimes, it just depends on the scale of your order.
Most US Post Offices do sell various sizes of shipping boxes for reasonable prices. You can also get them for free if you are willing to use their priority mail service by ordering them online, or stopping in your local post office and picking them up.