debcavan

I have used the plastic canvas, covered to match and sewn right through it (longer stitch and sew slowly)

It'sJustMe

I have used these also. Dollar Tree has 2-packs, each measuring 15"x12"...and, they are, you guessed it - $1.00 !!

JudyG

I use old political yard signs. Works great. And seeing as how there are always elections going on, not hard to get hold of. I just ask my neighbors who put signs in their yard if I can have them after the election is over.

GrannieAnnie

My choice for a bottom is multi layers of Craft backing ironed onto the bottom panel. Let just one or two layers extend to the stitch line and the next couple extend to just shy of the stitch line.

This is washable and will not break like plastic canvas or some other plastic bottoms.

deerhaven3

I've bought plastic canvas too, however, the one's I've found are only 13 1/2" long, so if your bag is larger than that then those don't work. Using cheap placemats is a good idea.

quilter309

I use plastic from the bottoms of my old reusable grocery bags. Heavier than a disposable cutting board, lighter weight than a lot of other things.

Delilah

I use the plasticore that everyone is making signs out of these days. Looks like cardboard but plastic, very light weight, great stuff! You can even use old campaign signs if you cover them with fabric.

BellaBoo

I use the short laminate wood flooring samples. It is light weight and the right size for most of the bags I make. Lowe's will give me the samples that have been discontinued free if they have any left. DH cuts them to the length I need if I need a shorter one and if I need a longer one well, they just snap together!

dphelps

I just did an overnight bag with the bottom using a layer of buckram, fusible fleece and two layers of fabric quilted together, It made a sturdy bottom and I liked the look. I have also used plastic canvas cut to the size of the bottom. I have foam board to use but do not want to use it on anything I feel may be washed.

mstalnaker

I've also used an old worn out cutting mat; makes a stiff bottom that isn't heavy. I cut it with good kitchen shears or a craft knife.