patterns >
Cozy Crafts by Kati
> Blue Wave Overlay Mosaic Hat and Ear Warmer













Blue Wave Overlay Mosaic Hat and Ear Warmer
SKILL LEVEL: Intermediate or Confident Beginner
Crochet Terminology: US crochet terminology
This pattern is for a crocheted hat with wave motifs, using overlay mosaic crochet techniques. The hat is made in the round, from the brim up, in one piece, requiring no seaming. There are instructions at the end on how to use this pattern to make an ear warmer (headband) or a blanket with the wave motif.
The Blue Wave overlay mosaic crochet hat is offered in four sizes (XS, S, M, L), that fits a head circumference of (17–18”, 19–20”, 21–22”, 23–24”) or (43–46 cm, 48–51 cm, 53–56 cm, 58.5–61 cm), typical of a (Child 3–10 years old, Teen/Small Adult, Medium Adult, Large Adult).
The hat is worked in the round, from the bottom-up, starting with the ribbing. This way, if you are unsure about which size to make, you can try it on early, see how it fits and change sizes, if needed. The pattern was developed for DK weight yarn, with a gauge of 18 dc stitches per 4”.
The crown’s dome shape is completed with decreases, so the top is smooth and round, not gathered/cinched. The shape is more of a beanie, not of a slouchy type hat.
This pattern is not complicated, but if you are completely new to crochet as a craft, this will be too challenging as a first project. If you are confident in your basic crochet skills, but new to mosaic crochet, this may be a good introductory project. The stitches you need to know are ch, slst, sc, hdc, dc, fpdc, bpdc. You need to know which is the front loop, and which is the back loop.
If you are experienced with mosaic crochet, you may find this project easy – some instructional details may be unnecessary to you, in that case, please feel free to skip the Tutorial sections.
The pattern includes written instructions and mosaic charts, provided separately for separate right-handed and left-handed crocheters, and round-by-round progress pictures.
This pattern includes 30 pages. If you decide to print it, you can print only the pages necessary for you – the Table of Contents will help you find the right page numbers.
2211 projects
stashed
3444 times
542 projects
stashed
501 times
- First published: September 2026
- Page created: September 19, 2026
- Last updated: October 2, 2026 …
- visits in the last 24 hours
- visitors right now

