Sea Turtle Quilt Block

Sea Turtle Quilt Block Tutorial by Stubbornly Crafty

It’s been a crazy couple of weeks. My computer crashed. Saddest. Day. Ever. My sweet husband and a ward friend worked on getting it back up and running for me. It’s had a nice overhaul now and is working better than it has in ages. All my files were backed up and I’m feeling pretty lucky. It could have been worse for sure.

Anyway, a while back I posted a tutorial for a crab quilt block that I designed. I’ve designed a few more sea creature blocks to go with it. They are all the same size (20″ × 22″ with borders) so you can put them together for a fun baby quilt (or larger) or just keep them as individual blocks for smaller projects like the mini quilt I’ve turned mine into.



  • ½ yd background fabric
  • 2 coordinating fat quarters for the turtle
  • ¾ yd backing and binding fabric


Cut out the following:

  • Shell: (1) 10.5″ × 10.5″
  • Face: (1) 4.5″ × 6.5″
  • Arms/Legs/Tail: (15) 2.5″ squares


  • (12) 2.5″ squares
  • (2) 2.5″ × 6.5″
  • (2) 4.5″ × 12.5″
  • (2) 2.5″ × 16.5″
  • (2) 2.5″ × 22″

Let’s get started.


Take four of your 2.5″ turtle body squares and draw a line from corner to corner diagonally onto the back. Place on the four corners of your 10.5″ × 10.5″ shell as pictured, making sure the diagonal lines match up to the outsides of your shell.


Sew each square along your drawn lines. Trim to a ¼″ seam allowance and press open.


Repeat, except this time taking the 4.5″ × 6.5″ face with two background squares, drawing diagonal lines on the back. Place on the top two corners and sew on the diagonal line. Trim and press.



Now we’ll be making six half-square triangles. Take six of your 2.5″ background squares and six of the 2.5″ sea turtle squares. Draw a diagonal line on the back of all six background squares. Place on top of your sea turtle squares, right sides together, and sew each set together along the diagonal line. Trim to ¼″ seam allowance and press open. Set aside.


Next, take your two 4.5″ × 12.5″ background rectangles and two of your 2.5″ turtle squares. Draw a diagonal line on the back of your squares and place on the top inside corners of your rectangles as shown. Sew, trim, and press.



To make the tail, grab one turtle 2.5″ square and two background squares. Draw a diagonal on the back of both background squares. Make a half-square triangle with the turtle square and one of the background squares. After you’ve pressed it open, place the second background square on top of your half square triangle with the diagonal line going in the opposite direction as the first one. Sew, trim, and press.


Now we can assemble. We’ll start at the top. Take two of your half-square triangles and one of your remaining 2.5″ turtle squares. Place the two half-square triangles on both sides of your square with the background side facing out so the turtle’s body color is on the inside lined up with the turtle square. Sew the three together. Press.

Repeat for the other side.


Take your 2.5″ × 6.5″ background rectangles and sew to the top of your three square sets you just sewed together. Press.


Take these two sets and place on both sides of your turtle’s face with the background rectangles on the top. Sew and press. Set aside.


Now we need to sew together the remainder of our squares. You should have two half-square triangles, two background squares, and your tail left. Place in a row with the half-square triangles on the outsides, background fabric on the bottom, then both background squares with the tail (facing upward) in the middle. Sew together.


Sew the row to the bottom of your shell.


Next, take your long background rectangles with the inward-facing 2.5″ squares on the top. Sew one to the left and one to the right of your turtles square. Make sure the tail is at the bottom of your shell, not the top.


Add the row with the turtle’s head.

Sea Turtle Quilt Block Tutorial by Stubbornly Crafty

All you have left to do is sew on the border. Start with the sides first and then do the bottom and the top. See how cute he is with Mr. Crab? Not a bad start to a mini-quilt wall, if I say so myself. I’d love to make another turtle and use hexies for the shell. If anyone does so, please tag me (#stubbornlycrafty) so I can ooh and ah over it.