How To Measure Picture Frame Dimensions

Ever bought a beautiful piece of art, only to be stumped when it comes to finding the right frame? Many people assume that picture framing is straightforward, but accurately measuring for the correct frame size is crucial to ensure your artwork is displayed beautifully and securely. A poorly fitting frame can not only detract from the visual appeal of your piece, but it can also damage the artwork itself. Too tight, and the art might buckle; too loose, and it could slip and get dirty.

Knowing how to precisely measure for a picture frame is an essential skill for any art lover, photographer, or DIY enthusiast. Whether you're framing a priceless painting, a cherished photograph, or a child's drawing, understanding the nuances of measuring will save you time, money, and potential heartbreak. It also empowers you to confidently choose frames that perfectly complement your artwork and home decor, creating a cohesive and visually pleasing display.

What are the key measurements I need to consider when choosing a picture frame?

How do I measure for the glass/artwork size needed?

The glass and artwork dimensions needed for a picture frame are dictated by the *inside* dimensions of the frame itself, not the outside. Carefully measure the inside width and height of the frame's rabbet (the recessed area where the artwork and glass sit). These inside dimensions determine the maximum size of your artwork and glass.

To elaborate, the rabbet is crucial for accurate measurements. This is the lip inside the frame that holds the artwork, backing, and glass in place. Use a ruler or measuring tape to measure the width and height from inside the left rabbet edge to the inside right rabbet edge, and from the top to the bottom. Precise measurements are essential to ensure your artwork and glass fit snugly within the frame without gaps or being too tight. If your frame is an irregular shape (oval, circular, etc.), you'll need to measure the widest points internally to determine the correct dimensions. Consider slightly reducing the measured dimensions by 1/16" to 1/8" to allow for minor variations in the frame or artwork and ease of assembly. A very tight fit can make it difficult to insert the artwork and can potentially damage the artwork or frame. This slight reduction ensures a comfortable fit, preventing pressure and allowing for easier removal or adjustments in the future. Remember, it's always better to have slightly too small artwork than artwork that won't fit!

What's the difference between frame size and image size?

Frame size refers to the *internal* dimensions of the picture frame, specifically the opening that holds the artwork or photograph. Image size, on the other hand, refers to the *external* dimensions of the artwork or photograph itself.

The frame size is critical for ensuring your picture fits properly within the frame. When selecting a frame, you want its listed dimensions (e.g., 8x10 inches) to match the actual size of your picture. If your photo is 8x10 inches, you need an 8x10 inch frame. However, the *visible* portion of your picture will usually be slightly smaller than 8x10 because the frame's lip, also known as the rabbet, overlaps the edges of the image to hold it securely in place. This overlap is typically a few millimeters on each side. Therefore, when measuring for a frame, always measure the *actual* image you want to frame, not just relying on what you think the size might be. If you're framing a print with a white border, decide if you want the border to show or be hidden under the frame's rabbet. If you want the border visible, ensure the frame's opening is slightly larger than the entire print (including the border). If you want the border hidden, the frame size should match the image size *excluding* the border.

Where on the frame do I measure for overall outside dimensions?

To measure the overall outside dimensions of a picture frame, you should measure from the outermost edge of the frame on one side to the outermost edge on the opposite side, both horizontally and vertically. This will give you the total width and height that the frame will occupy on a wall or other surface.

Imagine the frame resting flat against a wall. The outside dimensions represent the entire footprint of the frame, including any decorative elements or molding that extend beyond the inner edges which hold the artwork. It's critical to be precise when measuring, especially if you need the frame to fit within a specific space or if you are ordering a custom frame. Use a reliable measuring tape or ruler and measure to the nearest eighth of an inch, or even a sixteenth if precision is critical.

Keep in mind that some frames may have slight variations in their dimensions due to manufacturing tolerances or the style of the frame. If precise dimensions are crucial for your application, it may be worth contacting the frame manufacturer or retailer directly to confirm the exact outside dimensions before making a purchase. This is especially true for ornate or antique frames where variations are more common.

How accurate do my measurements need to be?

Accuracy is crucial for picture framing, generally aiming for within 1/16th of an inch (approximately 1.5 mm) for most projects. This level of precision ensures your artwork fits snugly within the frame without being too tight or too loose, and prevents gaps or slipping.

For standard artwork, like prints or photographs, consistently precise measurements are essential. Small discrepancies can accumulate, leading to noticeable problems like the artwork shifting inside the frame, showing unwanted background, or even being difficult to insert initially. This accuracy applies to both the artwork itself and the inner dimensions of the frame. Consider using a steel ruler or measuring tape, as cloth tapes can stretch and introduce errors. Double-check your measurements, and if cutting materials yourself, always err on the side of slightly larger rather than smaller to allow for fine adjustments. When dealing with more delicate or three-dimensional artwork, accuracy remains important but may require some adjustments. For example, if you are framing a piece with raised elements, you'll need to account for that depth when measuring the inner rabbet depth of the frame. In these cases, consider consulting a professional framer, as they have the experience and tools to handle unique framing challenges and materials with optimal precision.

What if my frame is an unusual shape, not rectangular?

Measuring an unusually shaped picture frame requires adapting standard techniques. Focus on determining the maximum horizontal and vertical dimensions that the artwork will occupy within the frame, essentially creating an imaginary rectangle around the visible portion of the art. These maximum lengths will dictate the size of the artwork required to fill the space.

When dealing with oval, circular, or irregularly shaped frames, you'll still need to identify the widest and tallest points within the visible area of the frame's opening. Use a flexible measuring tape to trace the inner edge of the frame. For curved sections, gently follow the curve to get an accurate measurement. If possible, create a template of the opening using paper or cardboard. This template can be laid over your artwork to ensure proper sizing and placement. Remember that the visible portion is what matters most for accurate artwork fitting. For complex shapes, consider dividing the frame opening into simpler geometric forms – triangles, rectangles, curves – to measure each section individually. Add the measurements of these sections together to determine the overall maximum height and width. If you're unsure, it may be best to consult with a professional framer. They have specialized tools and experience in handling unusual frame shapes and ensuring a perfect fit for your artwork.

How do I account for the frame's rabbet when measuring?

The rabbet, the recess on the inside back of the frame that holds the artwork, is crucial for accurate measurement. You need to measure the inside of the rabbet, the area where your artwork will actually sit, not the outside dimensions of the frame itself.

To get an accurate rabbet measurement, use a ruler or measuring tape and measure from the inside edge of the rabbet on one side to the inside edge of the rabbet on the opposite side. Ensure your measuring tool is lying flat against the rabbet surface for the most precise reading. This measurement represents the size of the artwork or mat board that will fit snugly within the frame. It's always a good idea to measure both the width and height of the rabbet opening in several places, as frames can sometimes be slightly out of square. Use the smallest measurement you find for each dimension to ensure your artwork fits correctly.

Failing to account for the rabbet will lead to issues. If you measure the outside of the frame, your artwork will be too small and will fall through the frame. If you measure the visible part of the artwork from the front, it will be too large and will not fit within the frame. Always measure the inside dimensions of the rabbet where the art rests.

Should I measure in inches or centimeters for picture frames?

Generally, you should measure in inches if you are in the United States, as most frames sold there use inch-based dimensions. Outside the US, centimeters are the more common and often preferred unit of measurement.

When determining the correct size for your picture frame, precision is key. Whether you choose inches or centimeters, consistency with the frame manufacturer's specifications is vital. Most frame retailers will clearly indicate the units they use; pay close attention when selecting a frame online or in a store. A seemingly small discrepancy, like confusing 12 inches with 12 centimeters, can result in a frame that's far too large or small for your artwork or photo. Ultimately, your choice of measurement units often depends on what you are most comfortable with and what the framing industry in your specific region primarily uses. To avoid errors, double-check the units before finalizing your purchase, and consider using a conversion tool if you need to switch between inches and centimeters. Being mindful of the units will ensure a perfect fit and a professional-looking presentation for your cherished artwork.

And that's all there is to it! Hopefully, you're now armed with the knowledge to confidently measure any picture frame like a pro. Thanks for reading, and feel free to swing by again anytime you have a framing question. Happy decorating!