Curvy Herringbone Pattern: When you gradually increase the size (height really) of the beads in a row, the beadwork arches, or curves. The instructions below are for a bracelet 6 beads wide, but can easily be modified for rows of 8 or 10 beads. For maximum "curviness", use 6 different types of beads of varying height. If you only have 3 or 4 types to use, that's fine. You will achieve a result similar to the red bracelet above. For this project, the height of the beads is the key, not the diameter. Each row should start with the shortest beads and end with the tallest. To determine the relative heights, string 5 to 7 beads of each type on a needle or headpin, and line them up from shortest to tallest.

Row 1: Weave the first row of beads using the ladder stitch (refer to the Herringbone Stitch Instructions if you need ladder stitch instructions). The row should be 6 beads wide and 2 beads tall, all size A. Leave a tail of thread of 6 - 8 inches. You will use this thread to finish this end of the bracelet.
Row 2: Weave 1 F and 1 E, 2 A, 2 A (Figure 1). After finishing the row with a "turn" (see Herringbone Stitch Instructions if necessary), remember to flip the beadwork around so you are again working from right to left.

Row 3: Weave 2 A, 1 C and 1 D, 1 E and 1F (Figure 2).
Row 4: Weave 1 F and 1E, 1 D and 1C, 1 B and 1A (Figure 3).

Row 5: Weave 1 A and 1 B, 1 C and 1 D, 1 E and 1 F (Figure 4).
Row 6: Weave 1 F and 1E, 1 D and 1C, 1 B and 1A (Figure 5).

Row 7: Weave 2 A, 1 C and 1 D, 1 E and 1 F (Figure 5).
Row 8: Weave 1 F and 1 E , 2 A, 2 A (Figure 6). You have now completed the first curve and should have 7 rows of FE, 5 rows of DC, and 3 rows of BA as shown in Figure 6.
Row 9: Weave 1 F and 1 E, 2 A, 2 A (Figure 7).

Row 10: Weave 2 A, 1 C and 1 D, 1 E and 1 F (Figure 8).

Row 11: Weave 1 F and 1E, 1 D and 1C, 1 B and 1A (Figure 9).

The graph in Figure 10 shows all of the rows for two curves. Follow this graph to complete rows 12 through 15:

Row 12: Weave 1 A and 1 B, 1 C and 1 D, 1 E and 1 F.
Row 13: Weave 1 F and 1E, 1 D and 1C, 1 B and 1A.
Row 14: Weave 2 A, 1 C and 1 D, 1 E and 1 F.
Row 15: Weave 1 F and 1 E, 2 A, 2 A.
Repeat rows 2 through 15 for the desired length of the bracelet. Bead two rows of size A beads at the other end to match the first ladder stitch row.
source http://www.renaissancebeads.com/patterns.htm