The pattern:
CO 45
5 rows seed stitch
Next row: Seed stitch 5 stitches K until last five stitches seed stitch last 5 stitches
Next row: Seed stitch 5 stitches P until last five stitches seed stitch last 5 stitches
Continue the last two rows until about 1.5 inches away from desired length
Last 5 rows seed stitch
This place mat is 15.5 inches by 11.5 inches
They are a little small so in the future I may cast on 50 stitches!