
When it comes to finding the right box for a 12x24 painting with a frame, there are a few things to consider. Firstly, the depth of the frame and painting will determine the size of the box required. Secondly, it is important to choose a box that provides adequate protection for the artwork, especially during moving or storage. Options include specialised art boxes, which can accommodate specific dimensions, or creating a custom box for the painting.
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What You'll Learn

U-Haul Mirror & Picture Box
The U-Haul Mirror & Picture Box is designed for packing and moving pictures, mirrors, artwork, paintings, and other framed objects. The box measures 37" x 4" x 27" (2.3 cu/ft) and can accommodate frames up to 37" x 27". It provides professional-grade protection for your items during moving or storage.
The box is rated for a weight capacity of up to 65 lbs, and the empty box weighs 2.65 lbs. It is acid-neutral but not acid-free. The U-Haul Mirror & Picture Box can be purchased individually at a price of $4.95 USD or $6.60 CAD.
For larger items, you can combine two Mirror & Picture Boxes to create a telescoping box. This option can accommodate framed objects up to 54" wide. To maximise protection for your items, you can pair the box with the Picture Packer Kit (sold separately), which helps to secure the frame corners during transit.
U-Haul also offers a Large Mirror & Picture Box, which fits framed items up to 48" x 32". For even larger items, you can combine two Large Mirror & Picture Boxes to create a telescoping box that fits framed objects up to 66" wide. The Large Mirror & Picture Box also provides professional-grade protection and holds up to 65 lbs.
Both the U-Haul Mirror & Picture Box and the Large Mirror & Picture Box are great options for safely packing and moving your framed items, depending on their dimensions.
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Acid-free backing
When it comes to packaging a 12x24 painting with a frame, it is important to consider the thickness of the frame and the painting itself. A standard U-Haul Mirror & Picture Box can accommodate frames up to 37" x 27" in size, but it is not acid-free.
Now, let's delve into the importance of acid-free backing and why it is crucial for preserving your artwork. Acid-free backing, also known as archival framing, is essential for maintaining the longevity and integrity of your artwork. Acidic materials, such as non-acid-free paper and certain framing elements, can cause discolouration, yellowing, and deterioration over time. This can affect the aesthetic appeal of your artwork, making it look brittle and unattractive.
The acid in paper, matting, and frame backings can alter the chemical composition of the artwork, impacting colour and image clarity. This process can lead to chemical burning, where the combination of wood pulp and water in the atmosphere creates sulfurous acid. This acid causes paper to become dry, brittle, and brown. Therefore, it is crucial to use acid-free materials for both the artwork itself and the framing components to ensure effective preservation.
By selecting acid-free framing materials, you are actively safeguarding your artwork against air pollutants and reducing the chances of yellowing and fading. Conservation-quality matting and frame backings, such as those treated with The Bainbridge Artcare™ process, are completely free of wood pulp, acid, and lignin, and they undergo additional buffering to maintain an alkaline balance. This ensures that your artwork remains in pristine condition over time.
To summarise, acid-free backing is a critical consideration when framing a 12x24 painting to ensure its long-term preservation and aesthetic appeal. By opting for acid-free materials, you are taking a proactive step towards protecting your artwork from the detrimental effects of acid, including discolouration and deterioration.
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Frame thickness
The thickness of packaging materials, such as cardboard, is typically measured in millimetres or microns. Thickness directly impacts the durability, resilience, and strength of the box. A thicker box provides better protection for your painting but also adds weight and cost. Therefore, selecting an appropriate thickness is essential to balance protection and portability.
Standard cardboard thicknesses vary depending on the type of cardboard and its intended use. For example, corrugated cardboard used for packaging has a thicker profile than flat paperboard due to its fluted paper layers. The thickness of corrugated cardboard can be customised by combining different flute sizes, ranging from micro-flutes to heavy-duty options.
When choosing a box for your framed painting, consider the specific thickness requirements. Thicker frames will necessitate a deeper box to prevent damage to the frame's corners during transit. It is recommended to measure the depth of your frame and select a box with corresponding internal dimensions.
Additionally, the weight of the box can be affected by the thickness of the cardboard. A thin cardboard sheet made from denser material may weigh more. Therefore, it is essential to consider the balance between thickness and weight when selecting the appropriate packaging for your framed painting.
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Shipping options
When it comes to shipping a 12"x24" painting with a frame, there are several options available to ensure safe delivery. Here are some shipping options to consider:
U-Haul Mirror & Picture Box
U-Haul offers a Mirror & Picture Box that can accommodate frames up to 37" x 27". For your 12"x24" painting, you can use a single box or combine two boxes to create a telescoping box for added protection. U-Haul also provides a Picture Packer Kit (sold separately) to secure the frame corners during transit. This option is suitable for both moving and storage, offering professional-grade protection.
Custom-Sized Boxes
Some companies, like Airfloat, offer custom-sized StrongBoxes for shipping framed artwork. You can specify the dimensions to ensure a perfect fit for your 12"x24" painting. These boxes are designed to be lightweight, durable, and puncture-resistant, providing excellent protection during shipping. StrongBoxes are also reusable, making them a cost-effective choice.
USPS Priority Shipping
The United States Postal Service (USPS) offers Priority Shipping services, which include free rectangular boxes in various sizes. You can order these boxes online from their website. For a 12"x24" painting, you might need to get creative by taking four boxes, disassembling them, and reassembling the sides around the painting to create a custom box. USPS provides free tape to secure the boxes, and they offer insurance and delivery confirmation options for added peace of mind.
Local Retailers and Recyclable Boxes
Another option is to inquire at local retailers or recycling centres for used boxes that might fit your 12"x24" painting. Sometimes, businesses may have spare boxes from shipments they are willing to give away for free. This approach can save you money and potentially find a box that perfectly fits your painting with some room to spare. Just remember to cushion your painting with materials like bubble wrap, Styrofoam, or biodegradable packing peanuts to fill any gaps and prevent movement during transit.
Shipping without Glass
If your 12"x24" painting is framed behind glass, consider removing the glass before shipping. You can replace it with a sheet of clear plastic to reduce the risk of breakage. This approach may require coordinating with the recipient or a local framer at their end to reinstall the glass upon delivery. While it adds a step to the process, it can significantly reduce the chances of damage during shipping.
Carrier Selection
When choosing a delivery company, it's essential to select one that handles fragile items with care. While some artists have their preferred carriers, it's crucial to properly pack fragile items regardless of the carrier. Ensure you follow any carrier size restrictions and clearly label your package as fragile to increase the chances of your painting being handled with extra care during transit.
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Custom-built boxes
If you're looking to build a custom box for a 12x24 painting with a frame, there are a few things you'll need to consider. Firstly, you'll want to decide on the style of the box and how thick and detailed you want it to be. You'll also need to take into account the thickness of the frame and painting.
For a simple DIY shadow box frame, you can follow these steps:
- Determine the thickness of your shadow box frame.
- Choose your glass carefully, considering factors such as cost and glare.
- Gather your materials, including pre-primed finger joint lumber, paint, wood filler, sandpaper, and glass.
- Cut your lumber to size, ensuring it is straight and true.
- Paint the inside edges of the lumber and allow it to dry.
- Sand the painted edges lightly and apply a second coat of paint.
- Assemble the three sides of the box and slide the glass into place.
- Attach the fourth side using wood glue and nails.
- Fill any nail holes and mitered joints with wood filler and sand the entire box smooth.
- Paint the top and sides of the box with two coats of paint, sanding between coats.
If you're looking to build a custom canvas float frame, here are the steps you can follow:
- Decide on the type of wood you want to use, such as oak or pine.
- Find straight and true wood planks and cut them to size using a miter box saw.
- Glue the pieces together and clamp them in place.
- Nail the corners together using a nail gun or hammer and nails.
- Add spacer wood between the canvas stretcher and the edge of the frame if you desire a wider, chunkier frame.
- Wipe away any excess glue and allow it to dry.
- Mount your artwork, ensuring even gaps all around.
For a custom box with a frame, you can follow these general steps:
- Determine the size and style of the box, considering the thickness of the frame and painting.
- Gather your materials, including wood, wood glue, finishing nails or wire brads, paint or wood stain, and sandpaper.
- Cut your wood to size, ensuring accurate measurements.
- Assemble the box using wood glue and clamps.
- Nail the corners together and wipe away any excess glue.
- Allow the glue to dry completely.
- Paint or stain the box as desired and allow it to dry.
By following these steps and adjusting the measurements to accommodate the size of your 12x24 painting with a frame, you can create a custom-built box that is both protective and aesthetically pleasing.
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Frequently asked questions
The box size depends on the thickness of the frame and painting. A box with dimensions of 37" x 4" x 27" should be suitable for most 12x24 paintings with frames.
Wrap each painting in Enviro-bubble to ensure they are well-protected. You can also use a Picture Packer Kit to keep the frame corners secure during transit.
For thicker frames, you can combine two Mirror & Picture Boxes to create a telescoping box that can accommodate framed objects up to 54" wide.











































