12x21 3D Pro 3.5" Deep K3 Stretcher Frame Kit

True Paper Size Proportion - 12x21 Size

This interesting palindromic 12x21 size is not based on any specific proportion, but this one is based on the 7:4 ratio.

Explore other sizes in this same 7:4 aspect ratio:

11x17 • 13x19 • 17x22 • 22x34 • 28x40 • 34x44

3D™ Pro 3.5 Stretcher Bar • 1/2" Canvas Clearance

1/2" Canvas Clearance is the space between the Bar and the canvas. Generally speaking, more clearance reduces the risk of the canvas touching the wood and creating unsightly lines during painting. Our design provides the optimal clearance so as not to impact your painting, but still leaving enough wood to the maximize strength of the Stretcher Bar.

• Produces a 3.5" deep stretched canvas (Actual depth is slightly thinner)
• 1.25" wide Stretcher Bar
• All Bars have an exclusive groove on the inside perimeter of the frame to which cross braces and Diamond Corner Braces attach
• Solid Ponderosa Pine or Fir from the Pacific Northwest

Solid Wood is Archival - Finger Jointed Wood is Not

We only use Solid Wood to build our Stretcher Bars because a solid piece of wood will last indefinitely. When we speak of archival value, it's not just the paint you use and the quality of your canvas and ground, even the wood choices manufacturers make are part of the archival process.

The principal reason manufactures use finger jointed wood is reduce cost, not increase archival value. Wood constantly grows and shrinks when the environment becomes hotter, or colder, or more humid, or more dry. Because finger jointed wood is made-up of multiple and varied pieces of wood, with varying grain patterns and densities, they each absorb and shed moisture at varying rates, which works on the glue joints that hold them together, causing the wood to bow and the joints to eventually fail, and certainly not consistent with increasing the archival value of your artwork frame support.

As a manufacturer, we do our part to conserve as much wood as possible, and still provide a quality made product that will out-perform any other in the marketplace.

• Super strong 3D™ Pro K3™ Stretcher Bar is a very popular among contemporary artists whose painting will be displayed without a frame.
• For this 12x21 large size frame, the frame provides the ultimate foundation for your art with increased strength and stability
• Provides a 3.5" deep stretched canvas which makes a bold and commanding display
• 1-1/4" wide Stretcher Bars
• All Bars have an exclusive groove on the inside perimeter of the frame to which cross braces and Diamond Corner Braces attach
• Solid Ponderosa Pine or Fir from the Pacific Northwest

Sustainability in our Forests and our Communities

At Masterpiece®, we believe in responsible and sustainable business practices. That's why we only use lumber from sustainably managed forests in our products. By doing so, we can help to protect our planet's forests, reduce our environmental impact, and support the communities that depend on these valuable resources.

22x31 is the Canvas Size Needed for this 12x21 Frame

Please note that you will need a canvas that is at least 10 Inches larger than the actual frame size to ensure proper stretching. This will provide ample material to stretch the canvas and attach it to the back of the frame. If you prefer to attach the canvas from the edge of the stretcher frame, you can reduce the size of your canvas by approximately 3/4" all the way around the frame. This will allow you to paint on the edge of the canvas and hang your artwork without needing a separate picture frame. And, if you ever need to remove the canvas from the frame and re-attach it, you'll have enough material to do that too.

Rooted in California and flourishing since 1965, Masterpiece® takes pride in its family-led legacy of crafting North America's premier Stretcher Bars. Our quest for excellence isn't just a goal but a commitment, positioning us as the trailblazers in the domain of fine-art canvas. Our innovative patents have set new benchmarks, ensuring our offerings stand unmatched. Dive into the tactile experience of our products, and you'll instantly recognize the distinct Masterpiece® quality, a signature appreciated by both your clientele and future art connoisseurs.

No longer would interiors, people who read and women who knit, be painted. There should be living people who breathe and feel, suffer and love. ♦ Edvard Munch

Edvard Munch, the Norwegian maestro of emotional expression on canvas, painted not just with brushes and pigments but with his very soul. Born in Loten, Norway, in 1863, suffered a great loss at the age of five years old when he lost his mother to tuberculosis. He later suffered his own illness that forever changed his perspective on life. He believe that we must transcend beyond the mundane and seek the profound. Drawing from his own tumultuous life, he implores us to infuse our art with raw human experiences, to capture the essence of existence in every stroke.

We stand on the shoulders of visionaries like Munch who dared to break free from convention and embrace the rawness of life. His art was his catharsis, a conduit through which he channeled his anguish, longing, and passion. In following his example, we can tap into the depths of our own emotions, transforming them into works that connect with our shared humanity. Munch's legacy reminds us that we are not merely creators of images; we are chroniclers of the human spirit. By venturing beyond the surface and breathing life into our art, we invite others to breathe, feel, suffer, and love with us, forging connections that transcend time and place.

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Embrace the synergy of this profound quote with our interpretation of it's meaning with a nice little portrait that we created of Edvard Munch. Time to create!