While quilt designers don't adhere to standard quilt sizes when designing bed quilt patterns (there's help for that further down on this page), bedding manufacturers tend to be a bit more consistent and do follow some general guidelines.
Our chart below shows the standard mattress, bedding and quilt sizes generally used in the United States.
Measurements are approximate; there are slight variations between manufacturers.
Pre-cut, packaged quilt batting sizes are also listed for your convenience.
After deciding which quilt size best fits your bed, add approximately 6"-8" to both width and length measurements to determine the batting and backing sizes that you'll need to finish your own quilts.
Quilts that are intended to be long arm quilted also need additional batting and backing.
Check with your longarm quilter for her specific requirements.
They are probably different than what you'd use if you quilted it on your home sewing machine. Remember that on a long arm machine, the layers are rolled together instead of pinned.
The definitions of the three sizes are:
For sizes tailored to your specific mattress, add the numbers for width and length (last 2 rows in pale yellow) to the width and length of your own mattress.
Pre-cut, packaged battings come in standard sizes:
This batting information is also included in the downloadable chart.
While manufacturers use standard quilt sizes for production, we all know that the quilt size you NEED depends on the mattress, bed frame and the "look" you desire for the bed to be covered.
There are a trio free, downloadable resources for you to use in your calculations:
You love the pattern, but it's meant for your master bedroom and it just doesn't fit the bed right.
Simple ways to change the dimensions without altering the pattern too much include:
Determining the quilt's size is only the first step in customizing a quilt pattern to your needs.
After the needed changes to the pattern, you'll need to rework yardage requirements. It's helpful to work through examples and there are a few on this site already. Click the links below to see them:
Other examples will be listed here and also on the individual design pages.
An index of those pages can be found at Quilt Design 101.