After 12 years on Mercer Island, What To Wear is closing this week. The boutique’s owner, Mia Kammerer, is retiring.

Today is the shop’s last day of business.

“It has been a fabulous experience, and I’ve loved every minute of it,” Kammerer said. “It was just time to try something new. I have been very well supported and we love our customers here. It has been a terrific experience.”

A Chicago native, Kammerer has lived on the Island for 13 years.

What To Wear has employed over a dozen local women along with 40 high school girls since it opened. Kammerer has counted more than 30,000 T-shirts sold, in addition to 5,000 pairs of jeans, 6,000 sweaters and 7,000 pieces of jewelry, and over 600 vendors.

“What To Wear taught me that I could be a stay-at-home mom with a nugget of an idea and act on it,” Kammerer wrote in a letter to clients. “Having a small business has been often challenging, but always rewarding.”

While she does not know what will come next, she does plan to relax, travel and play golf.