Simple, but gorgeous. I love the colour! Notice the trend: plain cut, relatively short skirt, high neckline, and a hat.
Apparently, it was the figure skating fashion of the 40’s.
1940's reflected the rationing necessity and the hemlines became higher in reflection of the fabric shortage which came to the end in late 1940's. In Europe, The Dior's New Look suit was frowned upon because it was long and wasted fabrics. In US and Canada simple and classic was the New Look and still have followers today. This look is reflected in a short classic dress worn in 1948 by Olympic champion Barbara Ann Scott doing her signature jump.
It reminds me of Katie’s skating outfit in Blizzard (2003).Zoe Warner as Katie Andrews, Blizzard (2003)
See, long plain dress and a hat! (Although I believe the movie was set in the late 50’s / early 60’s, but I’m not all that sure).
If evolution of skating dresses is something that you’re interested in, check out Fashion Evolution of Figure Skating Dress by Sabina Les of Fashionably Tied. It is very well done and illustrated and follows the look of figure skaters from the 20’s onward.