Step 1: Get an Ikea Goosen Side-sleeper pillow. It has just the right kind of fluffable, puffable stuffing.
Step 2: Get another Ikea Goosen Side-Sleeper pillow, because one doesn't have quite enough of the wonderul stuffing and you will find yourself sometimes, in the middle of the night, with all the lovely fluffable, puffable stuffing at two sides of the pillow and your head in the middle lying on the mattress.
Step 3: Unpick the seams on one of the pillows and cut open the end of the other.
Step 4: Take about 1/2 the stuffing out of the cut pillow and stuff it into the other pillow.
Step 5: Marry someone who is a way better seamstress than you so he can perform the pillow surgery for you.
Voila! The perfect size, shape, and fluffability. Sweet Dreams.