Hi Jaylynn21, This is an excellent question. For cosmetic breast reduction, meaning a reduction that you pay out of pocket for, there are no guidelines other than an understanding between you and your surgeon about your goals. Insurance based breast reduction is quite different. most insurance companies will not even consider approving a surgical breast reduction unless the patient has been through one year or more of multiple primary care doctor visits to document symptom severity, chiropractor appointments, massage therapy, and/or physical therapy. Many plastic surgeons will inquire about these prior to your initial visit, as we know that without these things, most breast reduction will not be approved. Your surgeon will document your symptoms, which often include back and neck and shoulder pain, bra strap grooving, trouble finding clothes that fit, and awkwardness in social situations. In addition, the physical exam will document your measurements as well as photos, and allow your surgeon to make an estimate of the amount of tissue that would be removed. You asked about the Schnur scale, which is a way to correlate your body surface area (the surface area of your entire body ruled out flat) with the expected removal weight to meet criteria for insurance. For example, a woman who is 5 foot 5 and weighs 180 pounds has a body surface area of 1.80. The Schnur scale would suggest that 441 g of breast tissue should be removed per side. While the Schnur scale is not the end all be all, many insurance programs use it as a guide to expected removal weight. This is specifically to avoid cosmetic mastopexy being passed off as medically necessary breast reduction. There are many factors that go into insurance paying for reduction, as noted above. Ultimately, getting your documentation in line as it pertains to her primary care doctor visits as well as other services, prior to making a point with a plastic surgeon would be in her best interest. Hope this helps. Best,Christopher Pannucci MDBoard Certified Plastic SurgeonPlastic Surgery NorthwestSpokane, Washington