The XL is  approx.  a size 7--8 PANTY ( not jean size, panties size) (USA) This is as large as you could be and still LOOK LIKE THE MODEL. By look like the model, I mean have the panties fit like they do the model.  I wear a size 8-9 and bought the XL ( b/c there was no 2x offered at that time) and they fit TIGHT  and are cute , but do not look like the picture. ( front comes up higher than back)  I am still happy with my purchase . I did not receive all
the colors shown and feel disappointed in that. The crotch is narrow and at best might let you wear a tiny liner, but no real period  pads.  Even a small liner bunches up if you do not get the panties sized correctly.
 edited to add: I have washed the panties  ( in washer) on delicate /tap water.  I let them air dry but believe I could have used my  delicates  setting on the  dyrer.  They did very well.  So far the lace has not ripped and the panty is intact. For sure some  care must be taken with these panties . I have seen panties that looked just like this at the dollar/dollar or dollar tree  type stores, so for those of you who really love them- check out the dollar type stores.  You will be surprised at the quality of underwear they  stock.
For those of you who think these are Granny panties, well, I guess you have never seen real granny panties. I guess if you are used to wearing a thong, then maybe they seem like a lot of coverage.  I usually prefer Bikini or Hipster cut but these are just adorable.