This tote measures 17 x 15 x 6 inches and is made from a Moorman's ShowTec swine feed sack. It is made of a waterproof material similar to a tarp but lighter weight.
My sack already had the string and paper closure removed on the top. I cut the sack bottom off with craft scissors then I took the bag to the bathtub and gave the sack a bath with warm water and liquid dishwashing detergent. Hang to dry.
After the sack is dry I used my rotary cutter and ruler to straighten the bottom. Then I measured three inches and made another cut. Repeat. These will be the straps.
I cut these open with my craft scissors. Then I measured and cut them 24 inches.
Then I finger pressed about 3/8" under on both long ends of each strap (do not use an iron-it will melt). Then fold in half. I used my binding clips and it worked great. Paper clips or paper holders would work. Take it to the sewing machine. I have already inserted a size 16 needle or you could use a jean (denim) needle. I set my stitch length to a large stitch. I topstitched both straps beginning with the folded edges first. Then I turned and topstitched the other side on both straps. Your straps are ready to be sewn in the tote.
I smoothed the sack out aligning the crease lines front and back. Then I sewed the bottom of the tote right sides out using a 1/4" seam. You will be sewing another seam on the bottom shortly and that will create a french seam.
I sewed on the line making sure the seam stayed turned the same direction on the back side. I did the same to the other corner to box it. Then I cut off the corner leaving a good sized seam allowance. I then turned the seam allowance under and stitched it down turning it toward the side of the tote. Repeat to the other corner. The tote is finished. Turn it right side out smoothing and straightening.
Let me know if you have questions or if anything isn't clear.