There is not much out there about this particular pair of iridescent shoes, however I found a post by Katy that read "Eat your heart ❤ out, Dorothy 🧺 Click your heels in colors way over the 🌈 #ShoesdayTuesday" which makes me think that she had been thinking of these as her special, new, updated version of the ruby slippers inspired by the THE WIZARD OF OZ.  

Iridescent pink points The Sissy 4-inch heel.  These shoes *seem* to be a US size 9 or 9.5 - I have looked and looked and can not find a size actually marked anywhere on the shoe(s).  I put a flexible fabric tape measure inside and measured just over 10.25-inches from point to heel, but that does not really take into account the extremely pointy-point.  

There is a clear, grippy tread on the bottom of the shoes which is very, very steady and secure.  I tried to "slide" them on the photo platform and they don't budge.  I think these would be very safe to walk and dance in.