While it varies from one machine to another 12.1mm - 12.7mm is usually the the largest stitch you can create. Any stitch longer than that will be broken up into a series of jump stitches. The smallest stitch you can usually sew is .1mm. When you sew stitches that are larger than the maximum you will significanly slow down the embroidery machine as it is embroidering 2 or 3 or even more stitches for each stitch larger than the maximum stitch length. If your machine has trimmers you can choose to have them activated at what ever interval of jump stitches you desire. You can have them activated at 2 jumps in a row or higher. This allows you to exactly control when the machine jumps and when it trims.
Getting back to small stitches if you actually take advantage of the smallest stitches possible you will probably experience thread breaks. The smallest stitch you can safely sew out is abut 3mm. So if you are experiencing problems with thread breaks, excessive trimming, or sewing speed you might want to consider some of these factors.
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