Easy Crochet Coaster Pattern: Sea Grass Style

Make an easy round crochet coaster with cotton yarn, five double-crochet rounds, and a fresh green V-stitch border.

By Giulia MorettiOctober 20, 2026

This easy crochet coaster pattern turns two colors of cotton yarn into a practical round mat with a fresh, sea-grass-inspired edge. Five simple double-crochet rounds build the flat center, while one contrasting V-stitch round creates the bold scalloped border. Every stage is photographed so you can check the hook placement, increase rhythm, color change, and finishing.

Why This Round Coaster Is Beginner Friendly

The project uses a small set of repeatable skills: a magic circle, double crochet, increases, slip-stitch joins, one color change, and a V-stitch. The center grows by twelve stitches on every round, making the count easy to predict. If you finish a round with the correct number and the fabric lies flat, you are ready to continue.

Working the center stitches between the posts gives the round a lightly ridged, radiating texture. The green edge is worked through the top loops so each V-stitch stays anchored and clearly defined. This contrast makes the easy crochet coaster pattern look more detailed than its construction really is.

Materials and Yarn Choice

8-ply cotton yarn in ivory and tan, or one variegated natural shade
8-ply cotton yarn in green for the border
4 mm crochet hook
Locking stitch marker, optional but helpful
Yarn needle
Sharp scissors
Rustproof pins and a blocking mat, optional

Cotton is the best choice because it absorbs condensation, holds its shape, and tolerates regular washing. Avoid fuzzy yarn for your first sample; smooth strands make it much easier to identify the spaces between double-crochet posts. If your label uses a numbered weight, compare it with the Craft Yarn Council yarn-weight system.

US Crochet Abbreviations

Abbreviation	Meaning
ch	chain
dc	double crochet
inc	work 2 double crochets in the same space
sl st	slip stitch
st / sts	stitch / stitches
sp	space
V-st	2 dc, ch 2, 2 dc in the same stitch

Construction Notes Before You Begin

Use US crochet terminology throughout.
The beginning ch 2 does not count as a stitch.
Join each round with a slip stitch.
Round 1 is worked into the magic circle.
Rounds 2-5 are worked into the spaces between the double-crochet posts, not under the top loops.
The green border is worked into the top stitches, not between the posts.
Count after every round: 12, 24, 36, 48, and 60 stitches.

The distinction between a post space and a top stitch is important. For the center, insert the hook into the open gap that separates two tall stitches and work around the complete post structure. For the border, return to normal placement under the top loops. The close-up photographs show both positions.

Easy Crochet Coaster Pattern Instructions

Round 1: Make the Center

With the ivory-and-tan yarn, make a magic circle. Ch 2, then work 12 dc into the circle. Pull the starting tail until the center closes neatly. Join with a sl st to the first dc. (12 sts)

Magic circle formed with ivory and tan cotton yarn beside a teal 4 mm crochet hook. — Form a loose magic circle and leave a tail long enough to tighten the center.

Beginning chain and first double crochet worked into the magic circle. — Chain two, then begin working the double crochets into the center ring.

First group of double crochet stitches growing around the open magic circle. — Keep the posts beside one another while the center remains open.

Twelve double crochet stitches completed around the magic circle. — Count twelve double crochets before pulling the starting tail.

Round one joined into a small flat crochet circle with the center tightened. — Close the center firmly and slip stitch to finish Round 1.

Round 2: Double Every Space

Ch 2. Beginning with this round, work into each space between the dc posts. Place 2 dc in every space around. Join with a sl st to the first dc. The circle should spread evenly without cupping. (24 sts)

Crochet hook positioned in the space between double crochet posts for Round 2. — From Round 2 onward, insert the hook between the posts instead of under the top loops.

Two double crochet stitches worked into the first space between posts. — Work two double crochets in the first between-post space.

Several Round 2 increases formed as paired double crochet stitches. — Continue placing two double crochets in every space around.

Half of Round 2 complete with evenly spaced double crochet pairs. — Pause halfway and check that every space contains one two-stitch increase.

Round 2 crochet circle nearly complete with paired stitches around the edge. — The circle should remain flat as it approaches twenty-four stitches.

Final Round 2 increase worked beside the beginning of the round. — Work the last pair before joining to the beginning stitch.

Completed Round 2 of the easy crochet coaster pattern with twenty-four stitches. — Join Round 2 and confirm a total of twenty-four double crochets.

Round 3: Alternate One Stitch and an Increase

Ch 2. Work 1 dc in the first space and 2 dc in the next space. Repeat [1 dc, inc] around, continuing to work between the posts. Join with a sl st. (36 sts)

Round 3 beginning with one double crochet followed by an increase. — Begin the one-double-crochet, two-double-crochet repeat.

Alternating single double crochet and increase groups in Round 3. — Repeat one double crochet in the next space and two in the following space.

Round 3 nearly complete with the crochet circle lying flat. — Check the circle for even expansion before completing the final repeat.

Completed Round 3 crochet circle with thirty-six double crochet stitches. — Join the round and count thirty-six double crochets.

Round 4: Add Two Stitches Between Increases

Ch 2. Work 1 dc in each of the next 2 spaces, then 2 dc in the following space. Repeat [1 dc in 2 spaces, inc] around and join with a sl st. (48 sts)

Round 4 beginning with two individual double crochets before an increase. — Begin the two-double-crochet, increase sequence between the posts.

Round 4 increases spaced after every two individual double crochets. — Keep each increase separated by two ordinary double crochets.

Round 4 nearly complete on the round cotton crochet coaster. — Smooth the work flat and complete the remaining repeats.

Completed Round 4 crochet circle with forty-eight double crochet stitches. — Join Round 4 and verify the forty-eight-stitch count.

Round 5: Finish the Flat Circle and Change Color

Ch 2. Work 1 dc in each of the next 3 spaces, then 2 dc in the next space. Repeat [1 dc in 3 spaces, inc] around. On the final joining slip stitch, pull the green yarn through to complete the color change. (60 sts)

Round 5 beginning on the ivory and tan crochet coaster circle. — Work three individual double crochets, then make the next increase.

Round 5 double crochet sequence expanding the coaster evenly. — Repeat the three-double-crochet, increase sequence around.

Round 5 crochet circle in progress with a teal crochet hook. — Maintain relaxed, consistent tension so the circle stays flat.

Round 5 nearing completion with evenly spaced increases. — Complete every repeat before joining the fifth round.

Green cotton yarn laid across the finished fifth round for the color change. — Prepare the green border yarn after counting sixty stitches.

Green yarn pulled through the joining stitch at the end of Round 5. — Complete the joining slip stitch with the new green yarn.

Completed sixty-stitch crochet circle with one green loop on the hook. — The base is ready for the contrasting V-stitch border.

For a larger mat, keep the same increase logic: the next round uses 4 individual dc before each increase for 72 stitches, followed by 5 individual dc before each increase for 84 stitches. Add only as many rounds as needed, and confirm the fabric stays flat before working the border.

Round 6: Crochet the Green V-Stitch Border

Ch 2. For this round only, work into the top stitches. In the same stitch, make a V-stitch: (2 dc, ch 2, 2 dc). Skip the next 2 stitches. Work a V-stitch in the following stitch. Repeat [V-st, skip 2] around. Join with a sl st, fasten off, and weave in every end. With 60 center stitches, the border contains 20 evenly spaced V-stitches.

First green chain stitches rising from the edge of the crochet coaster. — Chain two with the green yarn to begin the border.

First green V-stitch cluster worked into a top stitch of the coaster. — Work two double crochets, chain two, and two double crochets in the same stitch.

Completed first green V-stitch with two stitches skipped before the next cluster. — Skip two stitches after each V-stitch cluster.

Second green V-stitch forming along the coaster edge. — Repeat the V-stitch in the next available third stitch.

Several green V-stitch clusters completed around the cotton coaster. — Keep the clusters evenly spaced as the scalloped border grows.

Half of the bright green V-stitch border completed around the round coaster. — The V-stitches should fan outward without pulling the base.

Green V-stitch border nearly complete with the active loop on the hook. — Continue the same repeat until the last three-stitch section.

Full green scalloped crochet border completed around the coaster. — Join the final cluster and check the border for even spacing.

Finished sea grass crochet coaster lying flat with a green scalloped edge. — Fasten off, weave in the ends, and block the coaster flat.

Pair of finished sea grass crochet coasters with ivory centers and green borders. — Make a coordinated pair for the kitchen table or a handmade gift.

Close view of two completed crochet coasters showing the textured stitches. — The finished texture combines a dense round center with a raised green edge.

Troubleshooting a Round Crochet Coaster

Why is the center cupping?

Cupping usually means an increase was missed, the hook is too small, or the tension is too firm. Check the stitch count first. If the count is correct, relax the working yarn or try a slightly larger hook before remaking more than one round.

Why is the edge rippling?

Rippling usually means there are too many stitches or the tension has loosened significantly. Confirm that the increase is worked only once per repeat. A light ripple may disappear after blocking, but a strongly wavy circle should be corrected before adding the border.

Why do the V-stitches look crowded?

Make sure you skip two full top stitches between clusters. Each V-stitch uses one anchor stitch plus the following two skipped stitches, so a sixty-stitch round produces twenty clusters. Count the anchor points rather than judging by eye near the join.

Blocking, Washing, and Kitchen Use

Soak the finished coaster briefly in cool water, press out moisture in a towel, and pin it into a true circle without stretching the green border. Let it dry completely. Wash according to the yarn label and reshape while damp. This easy crochet coaster pattern may soften after washing but should keep its cotton stitch definition.

This easy crochet coaster pattern is intended for cups, cold glasses, and table decor. It is not an oven mitt or a substitute for a heat-rated trivet. Keep it away from open flames, hot cookware, and heating elements, even when made from cotton.

Color Ideas for a Handmade Set

Ivory center with sage or olive green for a quiet botanical palette
Oatmeal center with terracotta for an autumn kitchen
White center with navy blue for a coastal look
Cream center with cranberry red for holiday gifting
Solid cotton centers with leftover-yarn borders for a coordinated scrap set

For more kitchen-friendly makes, visit the Sweet Stitches crochet library, try the crochet pumpkin potholder, or make a set of autumn crochet coasters.

Easy Crochet Coaster Pattern FAQ

Can a beginner make this coaster?

Yes. A confident beginner who can make a magic circle, double crochet, increase, and slip stitch can follow it. The most unusual technique is working between the posts, and the close-up images show exactly where to place the hook.

Can I use acrylic yarn?

You can use acrylic for a decorative sample, but cotton is more absorbent and better suited to drink condensation. Never expose acrylic to high heat because synthetic fibers can soften or melt.

How do I make matching coasters the same size?

Use the same yarn, hook, stitch counts, and blocking diameter for every piece. Weighing the yarn before and after the first easy crochet coaster pattern sample also gives you a practical estimate for the rest of the set.

Can I make a larger placemat?

Yes. Continue increasing the number of ordinary double crochets between increases by one on each new round. The easy crochet coaster pattern becomes a placemat when you stop at the desired size, then work the V-stitch border over a stitch count divisible by three.

Make a Set for Your Table

One coaster is a quick skills project; four or six become a useful handmade gift. After testing the easy crochet coaster pattern, leave a comment with your yarn, hook size, finished diameter, and favorite color pairing so other Sweet Stitches readers can compare results.