How to Crochet a LEGO Blanket (Photo Guide) & Pattern Link

Reading Time: 7 minutes

Update: (Dec 2025): The full written pattern is now a printable PDF in my Etsy shop (instant download).
This post is a photo guide + planning companion  (materials, sizing, and FAQs).

👉 Get the Printable Pattern PDF here: 
👇 Prefer to browse first? Keep scrolling for photos, sizing help, & FAQ

Get my free beginner crochet guide (for when your stitches look wrong and you’re convinced you’re the problem – you’re not):

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What’s on this page vs what’s in the PDF

On this page (free companion guide)

• Yarn + color notes and substitution tips

• Finished block size + how to size up/down

• Block math for common blanket sizes

• Layout ideas + photo inspiration

• FAQs + troubleshooting + reader Q&A

In the printable PDF pattern (paid)

• Full LEGO block instructions (rows/stitch counts)

• Joining instructions

• Exact border used on the sample blanket (in the PDF  If you want other border styles, check out my Crochet Border Ideas here:)

• Printable format (easy to save/print)

• Bonus: private video walkthrough link (inside the PDF)

➡️ Grab the PDF here:

LEGO® is a trademark of the LEGO Group. This is a LEGO-inspired crochet design — not affiliated, not sponsored, not endorsed. Just yarn with suspiciously strong brick energy.

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Quickly jump to: 

• Story of how/why I created this blanket
• Great creative color combos for this blanket
• Sizing + Block Math (How to Resize)
• What others are saying
• FAQ’s

***Heads up: My posts contain affiliate links! If you buy something through one of those links, you won’t pay any extra, but it will help keep the lights on! Thanks!***

(((Add to your Ravelry Queue Here:)))

Once upon a time in 2016…

One of my most popular patterns over the years has been my Crochet LEGO Blanket — the big, squishy, “why does this look like actual LEGO?” kind of project.

I designed it as a graduation gift for my brother way back in 2016 (the youngest child, therefore legally obligated to be the family’s favorite… I don’t make the rules). He’s always been obsessed with LEGO®, and I wanted to turn that into something useful — like a blanket he could burrito himself into and never emerge from again while doing important teenage activities… like ignoring responsibilities.

I went hunting for a pattern that really nailed the look and came up mostly empty. I found a few ideas, but nothing that made me go yes, this is it. So I did what any crocheter does when the internet fails her: I panic-researched, winged half of it, stole inspiration from the void, and started building my own.

At the time, I didn’t even know the stitch I needed for the little “bumps” on the bricks. I’d never heard of the puff stitch (also called bobble stitch or popcorn stitch — crochet loves a confusing nickname situation). Once I figured out the texture, I started piecing together the parts I liked, made a lot of changes, and this blanket was born.

And yes — he got it in the 90-degree pre-summer Utah heat… and immediately crawled under it in my parents’ living room and started building actual LEGOs like this was the coziest, nerdiest ritual imaginable. Teenagers are weird. But the look on his face said everything — and that’s when I knew this one was a keeper.

Then the internet got involved.

About a year later, it went semi-viral and I was like… oh. OKAY THEN. And ever since, it’s been one of those projects that keeps popping up everywhere — people keep coming back to it, remixing it, and making it in their own color combos like the crochet version of “hold my beer.”

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Here are some great ideas on what can be done with this pattern.

People’s creativity with this is awesome!

 

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So, let’s get into some details. 

• Each block measures 3.5’’X5’’.
• The version of this blanket I am showing here measures 42’’X70’’.
• I used a J hook and “I love this yarn” from Hobby Lobby. (but honestly, any worsted-weight yarn will work beautifully! I also love using Red Heart Super Saver Solids because they have a great selection of colors!)
• Use whatever hook and yarn you want to achieve the desired size.
• There were 168 individual Lego Blocks made and sewn together to form the blanket. Yours can be adjusted to make whatever size blanket you want, simply by adjusting the number of individual blocks you make. I did four colors with a white border, but you can do as many colors as you want and adjust the number to make your desired size blanket.

Here’s a handy way to figure out some sizing. (See, I’m doing math for you. You’re welcome.

• Sizing + Block Math (How to Resize)

  • Finished block size: 3.5 inches tall x 5 inches wide (unblocked)

  • To size up: add more blocks across and/or down

  • To size down: use fewer blocks across and/or down

  Quick planning formula:

  • Blanket width ÷ block width = blocks across

  • Blanket length ÷ block height = blocks down

• For instance, this blanket I’d classify as a large throw and measured 42X70, (Brother is a tall 6’4” man!) I used 12 blocks across and 14 down. For a total of 168 blocks. This made a good throw size.
• The size I made in the paid pattern was a regular throw measuring 48X60, so I did 13 across and 11 down.
• Are we getting the picture on how to size up and down? It really just depends on what size you want to make and how dedicated (or caffeinated) you are in making all the blocks.
• BTW, wouldn’t this also make a great stash buster project?

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Here’s what some people just like you have said about this project! 

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Here are some FAQ’s about the Crochet Lego Blanket

• What size is one finished block?

The finished block measures 3.5”X5”. (All depending on your hook, yarn and tension, this is just an approximation)

• How do I resize this blanket (wider/longer)?

The beauty of this crochet blanket pattern is that it’s all block-dependent. You can make something small, like a baby blanket, or as large as a king blanket. All because of how many or few blocks you feel like creating.

Yarn Questions:

• What yarn weight works best? 

I recommend a worsted-weight yarn. DK could be fun to experiment with, but I have no firsthand knowledge of how those blocks would turn out. (If you try it out, please let me know, I’m dying to find out!)

• How much yarn do I need?

Again, it’s block dependent. However, to make the size listed in the pattern and the example here, I used seven full skeins. One skein of each color, and two of the white for joining and the border.

• My blocks are different sizes—what do I do?

I’d recommend checking your tension, your hook, and your yarn. My first go to is your tension. Make sure you keep it even the whole time you’re making each block, that’s the fastest way to get wonky sizes. If that seems solid, try experimenting with different yarn and hook combos until you hit on one that makes your block more uniform.

Troubleshooting:

• Best way to keep colors from clumping?

I literally just laid out my blocks on a bed and messed around with placement like a raccoon running rampant through the trashcan, carrying bits here and there until I was happy with the placement. Then I took a picture (because my ADHD brain was never going to remember what it ended up looking like) and worked from that reference. You could also draw it out on some paper with colored pencils, use an iPad app to sketch it out, the possibilities are truly endless.

• Can I make this baby-size? stroller-size?

Absolutely! Just count your blocks, do some basic math, and you’re on a roll

• What stitches are used? 

• How do I wash it / care instructions?

The great thing about using worsted-weight yarn is that you can machine wash it without too much fuss. I usually just toss it in the washing machine on cold, use mild detergent, and run through a normal cycle. I toss it in the dryer with some dryer sheets, and it comes out fluffy, soft, and ready to go.

• Where’s the full pattern?

The full printable PDF pattern (with the complete block instructions + joining + the exact border) is linked at the top of this post, or right here, so you don’t have to hunt for it.

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Ready to plan yours?

Pro tip: Bookmark this page — it’s meant to be your “planning + FAQ hub” while you’re making the blanket.

If you’re still deciding, here’s the easiest next step: pick your size, pick your color vibe, and use the block math above to map out your layout before you even touch yarn. Future-you will be grateful.

Want more inspiration?

• See more color combo ideas + finished blanket photos above (bookmark-worthy)

• Browse crochet border ideas to customize the edge (the exact border I used is in the PDF)

• Or check out my Blanket Patterns library for more projects like this

And if you make one? I want to see it. Drop a comment with your color palette (or tag me) so we can all collectively enable each other.

PS. Did you enjoy this post? If you did, would you do me a favor and share this with your friends? Just use one of the share buttons at the top of the post. Thanks, you rock!