What does 7x5 mean on this wig?

The lace closure measures 7 inches front to back and 5 inches side to side. That gives a deep part area but less styling range than a 13x4 or 13x6 frontal.

Is it really glueless?

Yes. It is built to be worn without adhesive, held by the cap's straps and combs. Some wearers still add a little glue or a melting spray for a longer hold.

Can I heat style or color it?

It is human hair, so you can use hot tools and dye it. Keep heat moderate and go to a professional for color to protect the wave pattern.

How is it different from a lace-front wig?

A closure covers only the front-center of the hairline; a frontal runs ear to ear. This wig is quicker to install and easier to maintain, but you cannot pull it back as freely.

What length and density should I pick?

Body wave reads fuller than straight hair, so a shorter length still looks substantial. Choose density by how much volume you want, not by length alone.