In all sincerity, black square glasses work well with any face shape. That said, if you like to follow “traditional” fashion advice, here are some suggestions. 
Square frames can make an excellent contrast for those with round faces. The angularity of the frames offsets round features in a striking fashion. If you have a heart-shaped face, black square frames can bring more angles to it, creating a sharp look. For those with triangle faces, square frames can underscore the unique shape by mirroring the angles in a reinforcing manner. 
Just remember, how you feel about the glasses is what matters the most.

Yes, you can use insurance for black square eyeglasses. Warby Parker partners with several different providers. If your insurance is one of them, a discount will automatically be applied to your order at checkout. 
Don’t stress if your insurance is considered out of network. You can still save an average of $100 by applying for reimbursement after checkout. You are also free to use an HSA or FSA account if you have one. It just needs to be affiliated with a major credit card.

Yes, we do. Most of the frames included in this collection can be ordered with progressive lenses. Black square glasses for progressive lenses start at $295.