Crochet Granny Square Phone Bag: How to Make a Cute Crossbody Phone Pouch With a Flap (Beginner Friendly)

This crochet phone bag style is a Pinterest favorite because it’s small, colorful, and actually useful. The design in your photo is a slim crossbody pouch made from two granny-style flower squares with a clean white border, a flap closure, and a long crocheted strap. It’s perfect for holding a phone, cards, keys, lip balm, or earbuds—without carrying a full handbag.

In this article, you’ll learn exactly what makes this phone pouch look neat and “handmade-but-polished,” the best yarn choices, the stitch options that hold shape, and a full build method you can follow to crochet one from start to finish.

Why a Granny Square Phone Bag Is So Popular

A granny square pouch checks all the boxes:

Quick project (you can finish it in one weekend)
Beginner-friendly (repeatable rounds and simple assembly)
Easy to customize (colors, strap length, button style, flap shape)
Great gift idea (small, lightweight, and practical)
Perfect for summer outfits and everyday errands

The flower-style square in your photo adds a “cute aesthetic” touch while the white border keeps it clean and modern.

Best Yarn for a Crochet Phone Pouch That Holds Its Shape

A phone pouch needs structure. If it’s too soft, it will stretch, sag, and lose its shape quickly—especially around the opening and strap.

Best yarn options:

Cotton yarn: crisp stitches and better shape control
Cotton blends (cotton/linen or cotton/hemp): even less stretch and more durability
Acrylic can work for decoration, but it’s usually softer and may stretch more unless you line the bag

If you want the pouch to feel sturdy, choose yarn that makes a dense fabric and avoid super fluffy yarn for the body.

Best Hook Size for a Sturdy Crochet Bag

For small bags, tighter is better. If your stitches look loose and you can see big gaps, your hook is too large.

Simple rule:

Use the hook size that makes the square feel firm, not floppy
If the pouch feels soft and stretchy, go down one hook size

A phone bag should feel like a “fabric case,” not a soft scarf.

Crochet Phone Bag Supplies Checklist

Here’s what you’ll need:

Yarn in 2–3 colors (like white + two pink tones)
Crochet hook
Stitch markers (helpful for corners)
Tapestry needle
Scissors
Button (or magnetic snap)
Optional lining fabric (recommended if you want a premium finish)

What Size Should a Crochet Phone Pouch Be

Most phone pouches work best in this range:

Width: 10–12 cm
Height: 16–19 cm (so the phone sits deep enough)
Flap length: 6–9 cm
Strap length: 100–120 cm (adjust to your height and preference)

To fit your exact phone, measure:
Phone height + 2 cm for comfort
Phone width + 1–2 cm so it slides in easily

The Flower Granny Square Look (Like the Photo)

The square in your photo looks like a flower granny square:

A center circle
Petal-like stitches around the center
A final round that forms a square shape
A clean border round (white) to unify the look

You can achieve this style with many “sunburst” or “flower” granny square variations. The exact flower doesn’t matter as much as keeping the final square size consistent for both pieces.

How to Crochet the Squares for Your Phone Bag

Make two matching squares:

Square 1: front panel
Square 2: back panel

General method:

Crochet the flower center in color A
Add petal rounds in color B (and optional color C)
Convert the circle into a square using corner stitches
Add one or two border rounds in white to create a clean frame

Important tip: Both squares must end with the exact same stitch count and size, or your assembly will look uneven.

How to Assemble a Crochet Granny Square Phone Pouch

Once you have two squares:

Place them right sides facing outward (pretty sides outside)
Whip stitch or single crochet around the sides and bottom
Leave the top open

Best seam for a neat look:

Single crochet join gives a clean edge and adds strength
Whip stitch is flatter and softer but can stretch more

If you want a more structured edge, use the single crochet join.

How to Add the Flap (Like the Photo)

The pouch in your photo has a flap made from a smaller matching square or a half-square style piece.

Option A: Flap from a third square

Crochet one smaller flower square
Attach it to the back panel near the top edge
Let it fold over the front

Option B: Flap crocheted directly onto the back panel

Join yarn at the top back edge
Crochet rows back and forth until the flap reaches the desired length
Shape it with decreases if you want rounded corners

For the cleanest look, add a white border round around the flap to match the bag.

How to Add a Button Closure

A button closure makes the pouch feel like a real mini bag.

Steps:

Sew the button to the front panel, centered
Make a button loop on the flap:

Chain a small loop
Attach it securely so it doesn’t stretch out

Test the closure with your phone inside so it isn’t too tight

If you prefer a more modern closure, you can use a magnetic snap (best added if you line the bag).

How to Crochet the Strap (And Stop It From Stretching)

The strap in your photo is crocheted thick and flat. That’s good because thin straps stretch and dig into the shoulder.

Best strap styles for strength:

Tight single crochet strap (dense and sturdy)
Slip stitch strap (firm and neat)
A flat strap with two rows of single crochet for extra body

For a long strap:

Crochet a strap strip
Attach both ends securely to the top sides of the pouch

Anti-stretch tip:
If you want the strap to stay perfect over time, you can sew a thin fabric ribbon or tape inside the strap (hidden) for reinforcement.

How to Make Your Crochet Phone Bag Look “Store-Bought”

If you want that polished finish:

Add a lining to prevent stretching and stop items from poking through
Use tight stitches and consistent tension
Block the squares lightly so edges are straight
Keep color changes clean and weave in ends neatly
Add a clean border round (white) to frame the design

Even a simple lining makes a huge difference: the pouch holds shape, the flap sits better, and the closure feels stronger.

Easy Lining Method for a Crochet Phone Pouch

Lining is optional, but highly recommended if the pouch will be used daily.

Simple approach:

Measure the inside size of your pouch
Cut fabric slightly bigger with seam allowance
Sew a small pouch shape
Insert it and hand stitch it to the top inside edge

If you’re adding a snap or magnetic closure, install it on the lining first, then attach the lining to the crochet pouch.

Cute Customization Ideas for This Phone Bag Style

You can keep the same design but change the vibe easily:

Pastel palette for “soft aesthetic”
Neutral tones for minimal fashion
Bright summer colors for festival vibe
Add a mini charm or keychain
Add a tiny pocket inside (for cards)
Make the flap scalloped for extra cuteness

You can also make matching sets: phone bag + scrunchie + small coin pouch.

Crochet Phone Bag Care Tips

To keep it looking fresh:

Avoid overloading it (crochet stretches under weight)
Spot clean when possible
If washing, reshape while damp and dry flat
Store flat so the strap doesn’t pull on the pouch

Crochet Granny Square Phone Bag Troubleshooting

If the pouch is too small:
Add one more border round to each square or use slightly thicker yarn.

If the pouch stretches:
Use tighter stitches, add lining, and reinforce the strap.

If the flap doesn’t sit flat:
Block the flap piece lightly and add a border round for structure.

If the button loop stretches:
Make the loop shorter and stitch it down more securely.

Reusable Formula: Make This Phone Pouch in Any Style

Crochet two matching flower granny squares, join the sides and bottom to form a pouch, add a flap (separate piece or worked directly), attach a button closure, and finish with a sturdy strap. Add a white border for a clean aesthetic and a lining for a professional finish.