BerkshireWomen's Plus-size The Easy On! 40 Denier Cooling Microfiber Tights

Are these tights opaque or see-through?

Why are queen petite and qp listed as separate sizes? what is the difference?

What is QP?

I'm 5' 4" 250 lbs, large belly and butt, legs and thighs, what size should i get. i thought about 5x6. never ordered tights before, need help plz.