These coasters are machine wash and dry friendly (they shrink just a little) ... and no matter what fabric you use: French inspired, modern, novelty, floral ... they look great.
Here is a copy of my original post from 2014.
Charm packs are perfect for making quilted coasters. Total items needed are 5 charms squares (5") and a piece of fusible fleece 4x4" or batting for each mat.
One charm pack makes 8 coasters with two scraps left over - not bad. They wash well and stand up to heavy use. A little fiddly to get all the triangles to nestle tightly together - and this is definitely where pinning helps as you sew.
Here are my suggestions & additional comments:
1) Absolutely use fusible fleece or batting for a little more weight on the back square. If you only have regular fleece and no fabric spray - you can sew an "X" through the back square only - this will latch your fleece or batting so it won't move when you 'turn' the coaster inside out.
2) If you are fussy like me, 'design' your coaster how you want it to appear ... then FLIP it over (and nestle it back together again) and sew your coaster with the wrong triangles images visible to you.
The images you see on the fabric just before you sew all the layers together are NOT what will appear when you turn the coaster inside out.
3) Use a small stitch. I usually sew off the coaster after each side but do a few reinforcing back and forth stitches at the corner area. Neatness does not count!
Trim corners and sides - then turn inside out.
After turning the coaster inside out - I use a chop stick to make the corners pretty.
4) Lastly - its personal choice whether to top quilt them - I say 'yes' as they tend to flop & not look finished. How to do it in one continuous line is shown (a little rustic) below.
Just My Type / Designed by Patty Young for Michael Miller
Warm & White batting
Aurifil 50wt. Light Sand #2000