# The Ultimate Guide to Seam Allowances ## What is a Seam Allowance? A seam allowance is the extra fabric added to the raw edge of a fabric before it is sewn together. It provides a margin of error for sewing and ensures that the seam will not fray or come apart. ## How Much Seam Allowance Should I Use? The amount of seam allowance you use will depend on the type of fabric you are using, the stitch you are using, and the desired finished look. Generally, a 5/8-inch seam allowance is a good all-purpose choice. However, you may want to use a wider seam allowance (such as 1 inch) for heavy fabrics or fabrics that fray easily. For lightweight fabrics, you may be able to get away with a narrower seam allowance (such as 1/4 inch). ## Types of Seam Allowances There are two main types of seam allowances: 1. **Finished seam allowance:** This type of seam allowance is folded over and pressed before the seam is sewn. This creates a clean, finished look and prevents the raw edges of the fabric from fraying. 2. **Raw seam allowance:** This type of seam allowance is not folded over or pressed. It is simply sewn together with the raw edges of the fabric exposed. This type of seam allowance is often used in garments that will be lined or finished with a facing. ## Choosing the Right Seam Allowance for Your Project When choosing a seam allowance for your project, you should consider the following factors: * **The type of fabric you are using:** Heavier fabrics require a wider seam allowance to prevent fraying. * **The stitch you are using:** Some stitches, such as the serger stitch, create a narrower seam than others, such as the straight stitch. * **The desired finished look:** A wider seam allowance will create a more finished look, while a narrower seam allowance will create a more casual look. ## How to Sew a Seam with a Seam Allowance 1. **Fold the fabric over along the seam line.** The fold should be the width of the seam allowance you are using. 2. **Press the fold.** This will help to keep the fabric in place while you are sewing. 3. **Sew the seam.** Use a stitch that is appropriate for the type of fabric you are using. 4. **Finish the seam.** If you are using a finished seam allowance, fold the seam allowance over and press it. If you are using a raw seam allowance, simply sew the seam together with the raw edges of the fabric exposed.
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