Zena, if it's solid color and looks the same on both sides, it won't matter. What were you cutting? If it was something like a blouse or jacket back or something symmetrical, it probably won't matter either.

Donna

All you do is flip the piece over and sew the seams.

Some people will pin a pattern to fabric folded right side up or right side inside depending upon their mood and the fabric at the time.

If the right side is inside, you mark on the outside, pin and sew. If the right side is facing you, mark on the inside, flip pieces to have right sides together and then sew. Once your markings are on the wrong side, it's easy to tell what in right and wrong side.

You could say it's a conceptual thing.

Donna and stitchntime9 thank you both. Upon your advice I have started sewing the skirt, thank again for the valuable advice

Zena11

I have been sewing for over 50 yrs? and I finally started to use white chalk to mark either the right side or the inside of the pieces thus avoiding taking out seams sewn in wrong. I even mark the top pf a skirt so I don't sew a zipper into the hem end of a skirt. ( yes, I've done that)

Good tips, Liza! I put a chalk/pencil "B" for the back and "F" for the front on the wrong side up along the waistline seam of the dress I'm making. Many of today's patterns (at least the ones I use) use the same pattern piece for the front and the back, so how would you know which is which unless you mark them?