18W is in Women's sizes, (fuller cut) and 18 is in misses' size (slimmer cut).
It is a 18. You have your answer in your question.
No!
Sizes XXL and 2X are exactly the same. The "2X" represents the two exes in "XXL."
The GCF is 9w.
When buying plus size women's clothing, women should understand how clothing is scaled. In any plus size clothing score, plus size clothing will be scaled to a model that is a size 18W. A woman's job is to ask a sales associate whether a particular store's clothing runs larger or smaller than the size 18W model. The 18W has an approximate height of about 5'10, and her bust is usually around 46 inches. The waist size of the model is 38 inches, while the hips are about 48 inches. Knowing these measurements will allow any woman to make the right choices in buying plus size clothing that has an adequate fit.
Since 18w is a factor of 54w2y, it is automatically the GCF.
Go for the same size you usualy use.
"W" means Women sizes like 16w, 18w, etc up to 40w or sizes 1x, 2x, or 3x. While that is partly true, clothes are assigned by women's body development. Women's bodies are different, or can be, than Misses. Because Childbirth changes you hip structure, and increases you breast size. Size 8w, 10w, 12w is also a normal size. As you see size junior 1x, 2x, 3x, etc. Junior sizes are for very young women of teenage. They are designed for as yet undeveloped female bodies. Small breasts, large rear ends, thicker waists.
size 18
9w
w2+18w+77 = (w+7)(w+11) when factored