Free Crochet Tiffany Tank Top Tutorial With Ribbed Underbust

This crochet Tiffany tank pattern is inspired by the classic Brandy Melville silhouette and is designed to be beginner friendly while still offering a clean and flattering fit. The top is built with softly shaped cups, a stretchy ribbed underbust for support, and a lightweight double crochet body that creates gentle movement without bulk.

Crochet Tiffany Tank Top

Adjustable straps and flexible sizing allow you to customize the fit to your body, making this pattern ideal for summer wear, layering, or casual everyday outfits. The decorative button detail adds a polished look while keeping the construction simple and accessible.

Materials

Lightweight or DK yarn suitable for summer garments
Crochet hook matched to your yarn
Scissors
Yarn needle
Decorative buttons

The Cups Make 2

Start with a slip knot and chain 9 to create the center height of the cup
Single crochet in the second chain from the hook and continue single crochet across the chain
In the final chain stitch work 3 single crochets to turn the corner
Continue single crochet along the opposite side of the foundation chain
Chain 1 and turn the work
Single crochet in each stitch until you reach the center stitch of the previous increase
Work 3 single crochets into that center stitch to form the top curve
Continue single crochet down the opposite side
Chain 1 and turn
Repeat the same shaping row, always placing 3 single crochets in the center top stitch
Continue increasing in this manner until the cup comfortably covers the bust
The sample size uses approximately 17 rows, but you may add or reduce rows as needed

Button Up Center Detail

Attach yarn to the inner straight edge of one cup
Chain 7 for the width of the center panel
Single crochet into each chain across
Skip one stitch along the cup edge
Insert hook into the next stitch, pull up a loop, turn the work, and single crochet back across
Repeat this process, attaching each new row directly to the cup edge
Continue until the center panel reaches about one third of the cup height

Fasten off and repeat the same steps for the second cup
Overlap the two center panels slightly to create the button placket effect
Pin or clip in place and set aside

The Ribbing

Attach yarn at one end of the overlapped cups
Chain the desired width of the underbust band
Single crochet in the second chain from the hook and across
Chain 1 and turn
Single crochet in the back loop only across the row to create ribbing
Repeat back loop single crochet rows until the ribbing measures half of your underbust circumference
Stretch the ribbing slightly when measuring to ensure a snug but comfortable fit

Assembly and Body

Fold the ribbing in half lengthwise to locate the center point
Position the cups evenly along the ribbing with right sides facing
Attach the cups to the ribbing using slip stitches or single crochet stitches
Once attached, do not cut the yarn
From one end of the ribbing, chain a long strap that will wrap around the back and over the shoulders
Ensure the chain is long enough to comfortably reach the opposite side
Begin working double crochet stitches into each stitch along the ribbing and cup edge
Place two to three double crochets into each stitch to create a soft flared body
Continue working double crochet stitches in a continuous spiral without joining rounds
When reaching the back area, you may switch to a double crochet chain one skip one stitch pattern for added breathability
Continue until the body reaches your desired length
To finish the spiral smoothly, switch from double crochet to half double crochet for a few stitches
Follow with single crochet stitches
Finish with slip stitches to level the edge