| Click to Download the Diagram | Seam Class | Needle Count | Typical Uses and Stitch Types |
|---|---|---|---|
| SSa | 1 or 2 | Seaming two plies using 100cl, 300cl, 400cl, or 500cl |
| SSb | 1 or 2 | Seaming two plies with one edge folded using 100cl, 300cl, or 400cl |
| SSc | 1 or 2 | Seaming two plies with a finished edge 100cl, 300cl, or 400cl |
| SSd | 1 or 2 | Seaming two plies using 100cl, 300cl, or 400cl |
| SSe | 2 | Seaming two plies with finished edge in two steps using 100cl, 300cl, or 400cl |
| SSf | 3 | Bottom Coverstitch Seaming on two plies using 406cl, 502cl, or 506cl |
| SSh | 3 | Bottom Coverstitch Seaming on two plies 100cl, 300cl,or 400cl AND 406cl |
| SSj | 1 or 2 | Seaming three plies Raw edge finish where center ply may be ribbon using 100cl, 300cl, or 400cl |
| SSk | 1 | Seaming three plies where center ply may be folded edge finish using 100cl, 300cl, or 400cl |
| SSl | 1 | Clean finish Seaming of two plies using 100cl, 300cl, or 400cl |
| SSm | 2 | Joining two Plies using 100cl, 300cl, or 400cl |
| SSn | 1 or 2 | Clean finish Seaming of two plies folded to one face using 100cl, 300cl, or 400cl |
| SSp | 1 or 2 | Seaming two plies using 100cl, 300cl, or 400cl |
| SSq | 2 | Seaming three plies using 100cl, 300cl, or 400cl |
| SSr | 1 | Seaming two plies using 100cl, 300cl, or 400cl |
| SSs | 1 or 2 | Seaming two plies using 100cl, 300cl, or 400cl |
| SSt | 2 | Seaming two plies using 100cl, 300cl, or 400cl |
| SSu | 2 | Clean finish Edge Seam with Third ply as tape using 100cl, 300cl, or 400cl |
| SSv | 1 or 2 | Internal Seaming of two plies using 100cl, 300cl, or 400cl |
| SSw | 2 | Seaming two plies with edges folded in two passes using 100cl, 300cl, or 400cl |
| SSx | 2 | Seaming three plies in two passes using 100cl, 300cl, or 400cl |
| SSy | 2 | Seaming three plies in two passes using 100cl, 300cl, or 400cl |
| SSz | 3 | Butt Seaming two plies in two or three passes using 100cl, 300cl, or 400cl |
| SSaa | 1 or 2 | Seaming two plies using 100cl, 300cl, or 400cl |
| SSab | 1 or 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSac | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSad | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSae | 2 | Seaming two plies with using 100cl, 300cl, or 400cl known as "French Seam" |
| SSaf | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSag | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSah | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSaj | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSak | 1 or 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSal | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSam | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSan | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSao | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSap | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSaq | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSar | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSas | 4 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSat | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSau | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSav | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSaw | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSax | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSay | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSaz | 1 or 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSba | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl AND 2x500cl |
| SSbb | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSbc | 1 or 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSbd | 1 or 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSbe | 2 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSbf | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSbg | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl |
| SSbh | 3 | Seaming multiple plies using 100cl, 300cl, or 400cl |
