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Mermaid Blanket for Me & My Doll

Updated: Jun 1, 2022

Londa’s Sunroom Sewing Studio

These days find me doing some really FUN sewing in preparation for an up-coming Doll Sewing Class for kids. Oh my heart aches to be able to snap a picture of my 2 1/2-year old granddaughter and her 'dolly' in what I've created, but alas she lives a days' drive away and her Mommy is just a little busy packing up the house to move even further away. is a picture from the original designer of these great Mermaid Tail Blankets.

images of mermaid tail blanket for child and 18" doll

These directions are adapted from those found at . I give full credit to the Blog author for the pattern pieces and basic directions. I have added a casing at the top of the band to keep the blanket ‘on’, and also refined the fit so that when sitting, the blanket doesn’t pull down at the back.

In addition, I’ve altered the attachment of the Tail to the Body so that one (or their Doll) can ‘walk’. So you choose - warm toes, or walking.

Please go to the links shown below under Cutting Directions to download the patterns for printing.

SUPPLIES - these supplies will yield ample for both a child AND an 18” doll.

  • Top Band and Tail: 1 1/4 (1.25) yard of 60” wide polar fleece.

  • Main Body (middle): 3/4 (.75) yard of 60” wide polar fleece for a young child. An older child will need 1 1/4 (1.25) yards. This could also be a 44-45" wide cotton print but it wouldn’t be a warm nor as stretchy. A smaller print is better than a great big one, especially if being used for the smaller scale doll.

  • 3/4” wide elastic in length comfortable for waist of child, or 11” of 1/4” wide elastic for an 18” doll.

  • NOTE for teaching children: ALL parts of polar fleece create quite a bit of bulk that many machines cannot handle. I suggest making either the Top Band and Tail OR the Main Body of a lighter weight fabric: for stretch: even a ponte double knit, or without stretch: quilting cotton or flannel. This is experience 'talking'. :)


Go to this link to ‘purchase’ at zero cost the pattern pieces.

Then, print them out on your home printer and tape them together.

1. Offset fold along the selvage 15” deep in order to cut out the TWO Mermaid tails for the Child Size on the fold of fabric as shown in the photo below. This will give you plenty of room to cut the Top Bands AND the Doll Size Mermaid Tails (nestled in on fold as shown).

2. Cut the Top Bands: (It is best for stretch if the longer length is along the width of the fabric)Cut two Top Bands for Child Size: 18” x 23”. Cut two Top Bands for Doll Size: 7” x 8 3/4” (8.75).

3. Main Body: Cut two pieces 36” x 23” for a toddler/young child OR for an older child, cut it longer: 45” x 23”. For 18" Doll: 14" x 8 3/5

layout plan for cutting mermaid tails
Offset fold 16" deep allows plenty of fabric for Top Bands

4. Shape the Main Body pieces at one end using the ‘Cut Out’ Pieces from the downloaded pattern.

Shape the lower end of the Main Body using the tall triangle shapes in the pattern.


Polar Fleece is very lofty, thick fabric. Use polyester thread, a Stretch Needle, and a LONG stitch length - like 3.5 to 4.0.

1. Wrong sides together (WST), stitch both long shaped sides of the Main Body using a 1/2” seam allowance. Pin these seam allowances OPEN.

2. SHAPE the Main Body by scooping out the FRONT 2” at center front for girls, 1 1/4" for 18" dolls, curving up at the sides as shown at the right below. Define this 'Front' by putting in a safety pin so you know this is the Front. You can see WHY I decided to do this in the picture below showing the doll in a sitting position - the BACK needs more length than the FRONT.

picture shows how the blanket doesn't come up high enough in the back when sitting.
See the problem if doll (or child) sits down? So cut the front shorter, and let the feet go through the bottom so you (or doll) can walk anyway. Together, this issue will be solved.