How short am I?

At work today I was reaching (struggling on my tiptoes) to put away a shirt when a customer came right up behind me into my personal space and giggled, "I thought I was short but YOU'RE even shorter than I am!" I smiled thru gritted teeth and said, "Yes ma'am." She kept giggling and called her daughter over to show her how short I am. She continued, "How short are you? Wow!" The daughter looked mortified, but the mother kept chuckling as she watched me finish putting away the shirt. Lady, you have got some SERIOUS nerve. You're not my friend, you're not my family - you're a total stranger, and the only reason I didn't scorch you with my glare and put you in your place is bc you're a customer and I need you to buy shit so I can keep my job. Anyhoo, other than that a solid day at Banana.