Chere's Pillowcase instructions:

PILLOWCASES, SUPER EASY, SERGER FRIENDLY: Use 44" wide fabric and leave on the selvages. Fold the fabric selvage to selvage and cut a piece 27 1/" or so long (you can vary this). Take a complementing piece of fabric and fold it selvage to selvage and cut a piece 9" long. Fold that piece in half the long way; you will end up with a strip 4 1/2" long by 44" wide. Open up the 27 1/2" piece so it is 44" wide. Right sides together, serge the body of the pillowcase (the 27 1/2" piece) to the border (the 4 1/2" piece). If the border and the body don't exactly match, trim so that they are even. Now, fold in half length wise, wrong sides together. You can now mark a place on the pillowcase (either on the body or the border or both, your preference) to ME on. Leave a 1/2" seam allowance on the side and center your marking. Unfold and hoop to ME. After you ME, serge the top and the sides of the pillowcase together. You will be serging off the selvage at this time. This is really fast and really easy. If you have a rotary cutter use it for all the cutting part and your serger for all the serging. If you don't have a serger you can do this on your ing machine but you will have to cut off the selvage yourself. The part that will take the longest is the MEing. If making a bunch of these, use simple designs with few color changes. The neat thing about these is that you can vary the length of the body and the border to whatever you like. You want to end up with a pillowcase about 31" long (I use that measurement as that is the length of my favorite pillowcase, do whatever suits you). Makes a regular size pillowcase. Great for using up scraps of fabric for borders. Sometimes I put another, thin border on and just use a 44" wide piece of fabric and doubled to the size I want; serge along with the border and body, putting the small piece between the two. Be sure you put the raw ends together for the serging; I have gotten absent minded and ended up with the raw edges on the outside!

And here are some instructions from our member, Goldilocks. Many thanks to her for yet another method of doing pillowcases.

Measurements for standard/queen pillowcases:

20W x 27L.
Preshunk and iron fabric first.
I cut the fabric 41 W x 23 1/2L.
Second cut is 41 W x 9 L (for 4" finished band).

I fold the fabric inside out and along the bottom and side with a 1/2" seam allowances, making the pillowcase. Then take the band piece and and fold it down to 41" x 4 1/2" and iron, right side out. On both ends iron a 1/2" fold towards the (wrong side/back) inside. Open up the piece and make a seam along the 9" side, making a tube. Pin and the band to the case, right sides together, matching seams. Open and iron the flap towards the inside of band fold. (Time to add embroidery to band.) Finish the band by folding the top flap edge under 1/2", then fold and pin over the raw edge. Topstitch and you're done.

Here is a slightly different way to do the pillowcases. Using a rotary cutter and mat for speed and accuracy, cut: (for a 20" x30" finished case)
Main fabric: cut 27" x width of fabric
Band: cut 9" x width of fabric
Narrow trim if desired: cut 2" x width of fabric

If using narrow trim band, press in half so it measures 1" x wof
Pin folded trim to one end of main fabric raw edges together trim on right side of main fabric.
Pinning right sides together, band on top of trim, on top of main fabric (you will have 4 layers.) Now flip this whole thing over and roll up the main fabric from the end toward the band (this is the so called hot-dog)
Fold up and over the roll then pin the remaining long raw edge of the band to the wrong side of the main pillowcase, leaving enough room to do your ing along the pinned edge of all 5 layers. This looks like a big roll now!!! Serge or stitch the seam...1/4-1/2 inch seam (be sure to remove all pins!)
Pull on the encased end of the rolled up case until it turns completely...whoola, the band is on and finished (just press to flatten everything.)
Fold the pillowcase, wrong sides together with selvedges together. I do my second cutting here. From the fold, and using a rotary cutter, this is 20 1/2" (total width of 41") Serge from the hem band end, up the side, and across the top...bury threads, turn and press. If you don't have a serger, you can stitch and zigzag or make a french seam to finish.
I haven't made many with embroidery on the band, but for those, I centered the design at 10 1/4 in from the center fold and middle of the folded band and stitched before attaching to case.