Knitting Pure and Simple Baby & Children Patterns - 0113 - Children's Mukluk Slippers is a similar pattern: 12 (3 sts. / inch) finished gauge, socks and footwear garment, and for babies and children. You may also like Carina Spencer Patterns - Kimono - Infant, which is another similar pattern: for babies and children and heavy worsted/aran (16-18 sts/4 in) yarn gauge.
You may enjoy taking a look at the Knitwhits Freia Sport Greensleeves Shrug, Knitwhits Freia Lace Lina Shirt, Knitwhits Freia Sport Undine Cowl, and Knitwhits Freia Lace Sonoma Shawl kits all using KnitWhits Patterns.
Hopefully our suggested yarn options for Viatrix Slouchy Hat can help you come up with your next exciting new project idea!