Short definition
Selecting the correct thread size is essential for achieving reliable sewing performance, seam quality and the desired product appearance. Although many users refer to thread thickness, the official technical term is thread size. The optimum thread size depends on the material, stitch type, seam requirements, needle size and sewing conditions.
How to Select the Right Sewing Thread Size
In order to ensure perfect sewability and a trouble-free sewing operation, the sewing thread must be matched to the following factors:
- Sewing material or fabric
- Needle
- Sewing machine
- Seam type
- Stitch type
Sewing tests remain the best method for selecting the appropriate thread size. The sewing material or fabric, as well as the sewing machine, determine the type of needle and the seam and stitch construction, and therefore the suitable sewing thread. Very fine fabrics, for example, require the use of the thinnest needles and sewing threads.
The recommended needle sizes for AMANN sewing and embroidery threads are available on the product pages, as well as in our brochures and colour cards. Depending on the sewing material or fabric and machine type, larger needles may also be required. These should be tested under production-like conditions in advance to avoid any subsequent deterioration in seam quality.
The size of the sewing thread influences seam properties such as cross-breaking strength, elasticity, abrasion resistance, appearance, and handle. Switching to a finer sewing thread to achieve finer seams has noticeable effects on seam strength due to the lower breaking strength of finer threads.
The appearance of prominent decorative seams can only be achieved by selecting a coarser sewing thread. The correct needle size for the respective fabric should always be determined in advance through testing. Depending on the structure of the outer fabric, damage may occur if a needle that is too large is used (fabric or mesh damage).
Quick facts
| Property | Value |
|---|---|
| Category | Thread selection |
| Purpose | Select the optimum thread size |
| Selection criteria | Material, seam, stitch type, needle size |
| Official terminology | Thread size |
| Common description | Thread thickness |
| Related topics | Needle size, stitch types, thread numbering |
Also known as
Technical terms
- Thread size
- Sewing thread size
- Thread fineness
- Thread count
- Thread designation
- Thread specification
Common descriptions
People often search for:
- Which thread size should I use?
- Which thread thickness should I use?
- Which thread is best for my fabric?
- How thick should my sewing thread be?
- Which thread size is suitable for lightweight fabrics?
- How do I choose the right thread size?
- What thread size do I need?
FAQ
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Thread size affects sewability, seam strength, and appearance. The wrong size can cause defects.
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Fabric, needle size, machine type, stitch type, and seam design all play a role. These must be aligned.
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Fine fabrics require thinner threads. Heavy materials require thicker and stronger threads.
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Thicker threads increase strength but may reduce flexibility. Finer threads improve softness but reduce strength.
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Yes, thicker threads create visible seams. Finer threads produce more subtle results.
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Practical tests reveal the best combination of thread, needle, and fabric. Theory alone is often insufficient.
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Too large needles can damage fabric. Too small needles can cause thread breakage.
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Through testing under real production conditions. This ensures reliable performance and quality.