21x49 3D Professional 2.5" Deep K2 Stretcher Frame Kit

True 7:3 Extended Domino Proportion - 21x49 Size

This 21x49 is a unique Masterpiece size and 7:3 Extended Domino aspect ratio.

The 7:3 aspect ratio brings a bold and dramatic horizontal stretch, perfect for wide compositions that need to feel expansive and open. This format pulls the eye across the canvas, making it ideal for landscapes, cityscapes, or any scene where horizontal flow is essential. The narrow vertical space adds a layer of complexity, requiring careful use of vertical elements to maintain balance without overwhelming the composition.

There’s a natural tension in this ratio. The wide format invites exploration of the edges, creating a sense of openness, while the limited height keeps the scene intimate and controlled. It’s a format that encourages you to emphasize sweeping gestures, long vistas, or minimalist abstractions. It's great for conveying motion, distance, or the vastness of a scene, all within a strikingly sleek frame.

Explore other sizes in this same 7:3 aspect ratio:

12x28 • 15x35 • 18x42 • 24x56 • 27x63 • 30x70 • 33x77 • 36x84 • 39x91 • 42x98 • 45x105 • 48x112 • 51x119

3D™ Pro 2.5 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 2.5" 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

No Finger Joints!

Solid Wood is far superior to finger jointed wood, which is many small pieces glued together, each with varying grain densities that absorb and shed moisture at varying rates, expanding and contracting non-uniformly as environmental conditions change, and causing the wood to bow and the finger joints to eventually fail.

A single homogeneous kiln-dried solid wood Stretcher Bar outperforms and outlasts a finger jointed Bar whose sole purpose is to save the manufacturer cost, not contribute to the archival value of artwork intended to last a millennium. As a manufacturer, Masterpiece® does its part to conserve as much wood as possible, and still provide a quality product that will out-perform any other in the marketplace.

• Super strong 3D™ Pro K2™ Stretcher Bar is a very popular among contemporary artists whose painting will be displayed without a frame.
• For this 21x49 large size frame, the frame provides the ultimate foundation for your art with increased strength and stability
• Provides a 2.5" 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

Sustainably Managed Forests Purify the Air

Our forests purify the air by filtering nearly 40% of the fossil fuel emissions humans create, and are critical to reducing global warming. More trees are needed on this planet, not fewer, for our own healthy human survival. Therefore, we use lumber grown in responsibly managed forests, so future generations can benefit from our responsible actions today.

Specially Dried and Heat Treated Lumber

We source our wood from a select group of top-tier environmentally conscious lumber mills in the Pacific Northwest. These mills specially dry and heat-treat the lumber to our specifications, resulting in about half the moisture content compared to wood from typical home improvement centers or lumber yards. This process makes the wood stronger, reducing the likelihood of cracking, splitting, or warping. While the wood we use comes at a higher cost, it ensures a more dimensionally stable end product. This stability is crucial for crafting fine professional canvases that support your invaluable art over time.

29x57 is the Canvas Size Needed for this 21x49 Frame

Please note that you will need a canvas that is at least 8 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.

Masterpiece® is a family-owned business operating in California since 1965 and producing the finest Stretcher Bars in North America. We deliver the highest quality and highest performing products in the business. We are widely recognized as the nation's leader and trendsetter of professional quality fine-art canvas. We own several patents that make our products perform superior to any other on the market. Once you touch one of our products, you'll immediately recognize our impeccable quality—and more importantly, so will your clients and those who acquire your art

All our knowledge has its origins in our perceptions. ♦ Leonardo da Vinci

Leonardo da Vinci, a polymath of the Italian Renaissance, was not just a painter of unparalleled skill but also an inventor, scientist, and philosopher. His insatiable curiosity about the world around him led to discoveries and insights that spanned a multitude of disciplines. From the intricate details of the human anatomy to the fluid dynamics of water, Leonardo's observations formed the foundation of his knowledge. The statement encapsulates his belief in the power of observation as the primary driver of understanding.

This emphasis on perception resonates profoundly. We often rely on our senses, especially sight, to interpret the world and represent it on canvas. Through our eyes, we capture light, shadow, form, and color. But it's not just about raw visual input; it's about how we, with our unique experiences and perspectives, interpret what we see. When we paint, sketch, or sculpt, we're sharing our personal perceptions with the world. It's a reminder that while techniques can be taught, the individual lens through which we view the world is what distinguishes each of us. Just as Leonardo drew from his perceptions to feed his boundless knowledge, we draw from ours to enrich and define our art.

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To enhance your creative exploration of our site, we offer the insightful wisdom of Leonardo da Vinci, our interpretation, and little one-of-a-kind portrait that we created. Now go paint!