Pattern weights are really useful for weighing down fabric or pattern paper when you sew.
I saw this tutorial on Pinterest for these lovely triangular pattern weights: http://tearosehome.blogspot.com/2012/12/tutorial-p...
I made a modification to the pattern such that you can sew the weights in one seam instead of multiple. Here's the instructable!
I sewed mine with a sewing machine (straight stitch, 2.5mm length), but you can also sew yours by hand. The pattern is 4 inches on each side. I did about a 1/4 inch seam, and mine are about 3 inches in height.
Step 1: Print Out Your Pattern Template
Here is the pattern template. Print it, cut it out, and trace the shape onto some fabric. Cut your fabric.
Step 2: Sew Your Pattern Weight
You want to sew according to the printed pattern, with the right side of the fabric facing inwards. The black circle indicates where on the fabric you'll start sewing, and the square indicates where you should stop. Sew the edges labeled 1 together, then the edges labelled 2, then the edges labelled 3.
For the last edge, leave an inch unsewn so that you will have room to turn the fabric inside out so that the right side faces outwards and the seams are hidden, and also so that you can fill it with rice.
Don't forget to backstitch at the beginning and end of the seam if you are using a sewing machine: http://sewing.about.com/od/beginner1/ss/How-To-Bac...
After sewing, snip excess fabric from the corners of the shape, and flip your fabric inside out, using your fingers to make sure that the corners are pointy.
Step 3: Fill Your Bags With Rice
You can also use beans or pebbles or anything else with weight. Mine took just over 3 handfuls to be full. I made a simple funnel cone out of paper for this step. I like to fill mine as much as I can before closing it up.
Step 4: Slip Stitch the Opening Closed
Slip stitch the opening closed by hand, so that the seam is nicely hidden. You will be sewing on the right side of the fabric, such that the excess fabric from the seam is facing inwards.