How to Knit the Mattress Stitch to connect two knitted pieces

Knitting - Mattress Stitch

This tutorial will show you how to use the mattress stitch to join two knit stockinette pieces together vertically. This finishing technique is worked with the right sides up and creates an invisible seam on the right side..


First, let's examine the knit piece to see the horizontal bars which will be used to create the invisible seam. In the picture below, I tugged on the knit piece so you can see horizontal bars between the knit stitches ( or "V"s). These bars will be used to draw the edges together.

Knitting - Mattress Stitch

* To close a seam, you will need a length of thread or yarn that is about 3 times the seam length.

* Place the knit pieces right side up, laying them next to each other.

* Begin joining the two pieces by bringing a threaded tapestry needle up from the back to the front of the first piece (referred to as piece #1) at the lowest corner (the cast-on row).

* Then, bring the needle up from the back to the front at the lowest corner of the second piece (referred to as piece #2).

• Insert needle into the same hole you originally inserted your needle through on piece #1 from back to front, pulling the yarn through to secure the pieces together. You are ready to start the mattress stitch.

• Insert the needle under the first horizonal bar between the first and second column of stitch on piece #2. You can insert it under one bar or two bars. Your choice.

Knitting - Mattress Stitch

* Take the tapestry needle back to the piece #1 and pick up the bar just above the initial entry point between the first and second column of stitches. Always pick up the same number of horizonal bars.

* Continue working back and forth between the two pieces for about an inch to two. The woven yarn going back and forth should look similar to the following photo.

Knitting - Mattress Stitch

* After completing the inch or two, gently pull the length of yarn to close the seam. The seam closes magically and looks like the following photo.

Knitting - Mattress Stitch

* Continue working in this manner until the seam is closed. Do not knot. Weave the ends into the knitted piece.

* If you turn the work over to the wrong side, you will see the seam.

Knitting - Mattress Stitch

Photo of the wrong side showing the seam

Below are some useful tools every knitter should have handy. Purchase them from the affiliate links:

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Aluminum Yarn Stitch Holder

The stitch holders are made of sturdy aluminum, have the very secure fastener on the end, and come in lively colors. 3 sizes of different length: 4.75", 6.75", 7.75" (120.6mm, 152mm, 203mm). 2 pcs of each size. Affiliate Link to Amazon


Knit Chek

Use this handy tool to check your stitch and row gauge for both knitting and crochet. Verify the size of knitting needles and crochet hooks. Affiliate Link to Amazon


Knitting Counter

Hand-held counter by Clover. Affiliate Link to Amazon


Knitting Needles Point Protectors/Stoppers

Quantity: 20picks(10 pcs large knitting needle point protectors + 10 pcs small knitting needle point protectors) Affiliate Link to Amazon


Ring Markers For Knitting or Crocheting

Mark your knitting or crochet rows/keep track of your loops. 10 small and 10 large in a pack. Affiliate Link to Amazon

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