Maelstrom Lunch Box Kids Dinosaur 9L

I bought this Christmas Flower Unicorn lunch bag by Maelstrom for the ability to fit a PlanetBox Lauch (pictured) lunchbox. Maelstrom states measurements on description as 12.4 x 8.5 x 3.7" (5.7" when expanded). The stated size of this bag is bigger than the PlanetBox Rover/Launch Carry bags which states 12x9x2.5” See picture that shows the false advertising for this bag here on Amazon. This Planet Box Launch lunch box is not even 10.5” wide. Had this Maelstrom lunch bag been what it advertised, it would have worked out and I wouldn’t have a sad little girl. It does fit another bento box I bought for my son (Brand: Renyqatt [stainless steel bento box for kids with soup cup] perfectly) but he doesn’t want this unicorn design. Fix the advertisement of size in the this ad please. I hate to return things but for this I must.