There is something deeply satisfying about watching a flat geometric shape transform into a smooth curve, and this coaster pattern captures that magic perfectly. The interplay between the structured granny square center and the soft, rounded border creates a visual rhythm that keeps crocheters engaged from the very first chain. It is a study in tension and texture, where the deliberate shift from double crochets to single crochets guides the fabric into its final, perfect circle.
Texture and Stitch Notes
The true charm of this project lies in the transition rounds. While the first two rounds establish a crisp, classic granny square foundation, Round 3 is where the magic happens. By mixing stitch heights—moving from tall double crochets down to short single crochets—you are essentially “curving” the fabric. This technique softens the sharp corners of the square, pulling the edges outward to meet the circular shape. It is a subtle textural shift that adds depth to the coaster, making it feel more complex than it actually is. The two-color alternation further highlights these stitch changes, creating a subtle striped effect that draws the eye to the geometric construction.
Project Overview
This is a quick, beginner-friendly project that works up in rounds from the center out. It features a mini granny square nested inside a circle, utilizing a clever construction method that transitions from square to round through specific stitch placement. It is an excellent confidence builder for newer crocheters and a perfect stash-busting project.
Why This Pattern Stands Out
- Beginner Friendly: No advanced techniques are needed, making it a great confidence builder.
- Quick to Make: Each coaster is small enough to finish in a single sitting.
- Great for Gifting: Practical, handmade, and compact enough to whip up a whole set.
- Technique Value: The square-in-circle construction is a useful skill that carries over into other projects.
- Stash Friendly: Uses a small amount of yarn, perfect for using up leftovers.
Materials
- Yarn: Sport Weight Yarn (Weight 2) in two colors. Sport weight is fine enough to show stitch detail but not so thin that it becomes fiddly. You will need approximately 20 to 40 yards per color.
- Crochet Hook: 3.00 mm hook. This size keeps the fabric firm without being stiff, ensuring the stitches hold their shape.
- Notions: Yarn needle and scissors.
Gauge and Finished Size
Gauge: Gauge is not critical for this project. Use the stated hook size (or similar) and yarn to create an even fabric; adjust hook size if needed to get a coaster thickness and drape you like.
Finished Size: Approx. 4 in (10 cm) diameter coaster.
Abbreviations
All familiar basics here, nothing unusual.
- ch = chain
- ch-sp = chain space
- dc = double crochet
- hdc = half double crochet
- sc = single crochet
- sl st = slip stitch
- st(s) = stitch(es)
- * * = repeat instructions between * * as directed
Pattern Notes
- This is a quick beginner project: a mini granny square worked inside a circle, all in rounds. I work in US terminology throughout.
- Round 1 starts in the first color. You’ll chain 4 and slip stitch to the first chain to form a ring, or substitute a magic ring if you prefer a tighter center. Either works fine here.
- Color changes happen at the end of specified rounds. When the instructions say to join with “ch 1,” that chain 1 is part of the color change, not a separate step — work it exactly as written. Weave in ends as you go or all at once at the end, whichever you prefer.
Pattern Instructions
Building the Coaster
This coaster works up in five rounds, starting from a small center loop and expanding outward through a granny-square-style structure before finishing with a rounded border. You’ll be switching between two colors as you go, so have both ready before you start.
Round 1
In first color, ch 4, sl st in first ch to form a loop (or use a magic ring), ch 3, 2 dc in center of loop, ch 2, *3 dc in center of loop, ch 2* repeat 2 more times, sl st in top of ch 3, sl st to first ch-2 sp and join second color with ch 1.
The ch 3 counts as your first dc here, so you’re building four groups of 3 dc with ch-2 corner spaces between them. The sl st to the ch-2 sp at the end positions you perfectly to start Round 2 in the corner.
Round 2
Ch 3, [2 dc, ch 2, 3 dc] in same ch-2 sp, ch 1, *[3 dc, ch 2, 3 dc] in next ch-2 sp, ch 1* repeat 2 more times, sl st in top of ch 3, join first color with ch 1.
This is the classic granny square corner round. Each ch-2 sp from Round 1 becomes a full corner cluster, and the ch-1 spaces between corners will be used in Round 3.
Round 3
1 dc in first ch-1 sp (slightly working backwards), 1 dc in next st, 1 hdc in next st, 1 sc in next st, 2 sc in next ch-2 sp, *1 sc in next st, 1 hdc in next st, 1 dc in next st, 2 dc in next ch-1 sp, 1 dc in next st, 1 hdc in next st, 1 sc in next st, 2 sc in next ch-2 sp* repeat 2 more times, 1 sc in next st, 1 hdc in next st, 1 dc in next st, 1 dc in same first ch-1 sp as previous dc at the beginning, sl st in top of first dc to finish.
This round is where the square shape starts transitioning toward a circle. The mix of dc, hdc, and sc heights around each side gradually curves the edges. The “slightly working backwards” note at the start just means you’ll turn back into the ch-1 sp you’re already sitting next to — don’t overthink it, just place that first dc there and follow the stitch sequence.
Round 4
Ch 1, *1 dc in next 3 sts, 2 dc in next st* repeat around, sl st in first dc and join second color with ch 1.
The evenly spaced increases in this round help push the shape toward a rounder silhouette. Make sure you’re counting your repeats consistently all the way around before joining.
Round 5
Sl st in each st around. Fasten off and weave in all ends.
The slip-stitch border gives the edge a clean, defined finish. Keep your tension relaxed here so the edge doesn’t pucker or pull inward.
Care Instructions
Lay the coaster flat to dry after washing so it keeps its shape. Coasters this size can curl at the edges if they dry bunched up or draped over something, and once the yarn sets that way it’s a pain to fix. Since the fiber isn’t specified here, check your yarn label before tossing it in the machine. Hand washing in cool water is usually the safe call for sport weight, and these dry fast anyway given how small they are.
FAQs
What is the square in a circle effect and how does it happen?
The square shape comes from Rounds 1 and 2, which are worked as a classic granny square with four corner ch-2 spaces. Round 3 then transitions the piece into a circle by filling in those corners with a mix of dc, hdc, and sc stitches that gradually curve the edge outward. You don’t do anything special to make it happen — the stitch combination does the work.
How do the color changes work in this pattern?
There are two color changes, and both happen at the end of a round using a ch 1 join rather than a standard slip stitch join. At the end of Round 1 you drop the first color and join the second with ch 1. Then at the end of Round 4 you drop the second color and bring the first back in the same way. Round 3 runs entirely in the first color, so there’s a stretch in the middle where you’re not switching at all.
What does ‘working slightly backwards’ mean in Round 3?
Round 3 starts with a dc worked into the ch-1 space from the previous round, but the stitch sequence means you place that first dc slightly behind where you’d normally begin. It’s a bit awkward the first time, but it’s there to close the round cleanly so you don’t end up with a visible gap at the join. Just place your hook into that ch-1 space and work the dc — it’ll make sense once you’re in it.
Can I use a different hook size?
The 3.00 mm hook is a starting point for sport weight yarn, but hook size here isn’t critical the way it would be for a fitted garment. A slightly larger hook will give you a looser, slightly bigger coaster. A smaller one will tighten things up. The finished size is meant to be around 4 inches, so if that matters to you, swatch first and adjust from there.
What skills do I actually need to make this?
You need to know how to chain, slip stitch, and work dc, hdc, and sc. The color changes use a ch 1 join, which is a small technique to learn if you haven’t done it before, but it’s straightforward once you see it once. Round 3 is the most involved round because the stitch types shift as you go around, but there’s nothing in here that requires advanced crochet experience.
Happy Crocheting.
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