Stitch Length can vary according to the object type as follows:
Single Stitches 
: each stitch may be set from 1-12mm in 1mm steps, or embroidered without breaking up into smaller stitches.
Note: The current maximum stitch length for new Single stitches if it is desired to break them up into smaller stitches is shown in the General Preferences.
Running Stitch 
: may be set from 0.3-12mm in 0.1mm steps.
Note: Cutwork needle lines are automatically set to 0.3mm.
Double Stitch 
, Double Zigzag 
 or Triple Stitch 
: stitches may be set from 1-12mm in 0.1mm steps.
Motif Line 
: stitches may be set from 1-20mm in 0.1mm steps.
Motif Fill 
: the length of the running or triple stitches making the motif shapes can be set from 1-12mm in 0.1mm steps.
Feathered Satin 
 (feathered both sides or one side): the maximum length of the stitches may be set from 2-30mm in 1mm steps.
MultiWave Fill 
, Shape Fill 
 and Curved Crosshatch Fill 
: where Motifs are used, the length of the running or triple stitches making the motifs can be set from 1-12mm in 0.1mm steps.
QuiltStipple 
, Contour 
 and Crosshatch 
 fill: the length of the running or triple stitches making the fill can be set from 1-12mm in 0.1mm steps.
Echo Fill 
 and Curved Crosshatch Fill 
: the length of the running, double or triple stitches making the fill can be set from 1-12mm in 0.1mm steps.
Note: Check the current setting by clicking the Options (ellipsis) button in the control panel.