Crochet Hook 4.5 mm (7)

The 4.5 mm crochet hook – otherwise known as a size #7 hook – is used for lighter yarns, such as #2 Fine/Sport/Baby and #3 Light/DK/Worsted. This hook is great for any crochet project where you want a crochet project that is tight with little give or holes. Dishcloths, beanies, and sweaters all work up great with the 4.5 mm / 7 crochet hook.

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Free Crochet Patterns using 4.5 mm (7) Crochet Hooks

These free crochet patterns were all created using various yarn types and brands, but all use the 4.5 mm (7) sized crochet hook.

Floral Cardigan

Floral Cardigan

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Hobbii,
  • Yarn Name: Friends Cotton 8/6,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Half Double Crochet, Single Crochet, Triple Crochet,
  • Color: Neutral,
Labyrinth Poncho

Labyrinth Poncho

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: Mary Maxim,
  • Yarn Name: Mellowspun DK,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7), 5 mm (H-8),
  • Stitches: Double Crochet, Single Crochet, Single Crochet Back Loop,
  • Color: Black, Blue, Neutral, Variegated,
Cole’s Pumpkin Crochet Beanie

Cole’s Pumpkin Crochet Beanie

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet, Single Crochet Back Loop,
  • Color: Green, Orange,
Cool Crochet Balaclava Pattern

Cool Crochet Balaclava Pattern

Free Crochet Pattern
  • Skill Level: 1. Basic,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
  • Color: Black, White,
Cool Crochet Bucket Hat

Cool Crochet Bucket Hat

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Double Crochet Increase, Single Crochet,
  • Color: Orange, Pink,
Franny Granny Adult Cardigan

Franny Granny Adult Cardigan

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: WeCrochet,
  • Yarn Name: Comfy Worsted,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
  • Color: Neutral, Variegated,
Franny Granny Adult Dress

Franny Granny Adult Dress

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: WeCrochet,
  • Yarn Name: Comfy Worsted,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
  • Color: Blue, Green, Neutral, Pink, Red,
Franny Granny Child Dress

Franny Granny Child Dress

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: WeCrochet,
  • Yarn Name: Comfy Worsted,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
  • Color: Green, Neutral, Orange, Pink,
Hyacinth Bucket Hat

Hyacinth Bucket Hat

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet, Single Crochet,
  • Color: Brown,
Block Blanket Knit

Block Blanket Knit

Free Crochet Pattern
  • Skill Level: 1. Basic,
  • Yarn Brand: Zeeman,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Color: Blue, Gray, Green, Pink, White,
Seda Triangle Bandana

Seda Triangle Bandana

Free Crochet Pattern
  • Skill Level: 1. Basic,
  • Yarn Brand: Hobbii,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Double Crochet Increase,
  • Color: Variegated,
Sunburst Square Bucket Hat

Sunburst Square Bucket Hat

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: Lion Brand,
  • Yarn Name: Jeans,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 3.75 mm (F-5), 4.5 mm (7),
  • Stitches: Double Crochet, Half Double Crochet, Half Double Crochet Two Together, Puff, Single Crochet, Single Crochet Two Together, Triple Crochet,
  • Color: Blue, White,
Franny Granny Square Sweater

Franny Granny Square Sweater

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: Hayfield,
  • Yarn Name: Bonus DK,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
Worry Worm

Worry Worm

Free Crochet Pattern
  • Skill Level: 1. Basic,
  • Yarn Brand: Paintbox Yarn,
  • Yarn Name: Simply Aran,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Single Crochet, Slip Stitch,
  • Color: Neutral, Red,
Bee Worry Worm Crochet Pattern

Bee Worry Worm Crochet Pattern

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Single Crochet, Single Crochet Back Loop,
  • Color: Black, White, Yellow,
Franny Granny Square Cardigan

Franny Granny Square Cardigan

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: Lion Brand,
  • Yarn Name: Color Theory,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
Spring to Summer Light Mesh Top

Spring to Summer Light Mesh Top

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Red Heart,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Color: Pink,
Rosa Shawlette

Rosa Shawlette

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Scheepjes,
  • Yarn Name: Stone Washed,
  • Yarn Weight: Weight 2 – Fine,
  • Hook Size: 4.5 mm (7),
  • Stitches: Tunisian Simple Stitch,
  • Color: Pink,
Franny Granny Child Cardigan

Franny Granny Child Cardigan

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
  • Color: Variegated,
Franny Granny Child Sweater

Franny Granny Child Sweater

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
  • Color: Variegated,
Franny Granny Child Hoodie

Franny Granny Child Hoodie

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
  • Color: Variegated,
Tunisian Heart Coaster

Tunisian Heart Coaster

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Scheepjes,
  • Yarn Name: Stone Washed,
  • Yarn Weight: Weight 2 – Fine,
  • Hook Size: 4.5 mm (7),
  • Stitches: Tunisian Simple Stitch,
  • Color: Pink,
Lovely Heart Coaster

Lovely Heart Coaster

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Scheepjes,
  • Yarn Name: Stone Washed,
  • Yarn Weight: Weight 2 – Fine,
  • Hook Size: 4.5 mm (7),
  • Stitches: Tunisian Simple Stitch,
  • Color: Pink,
Theo Amigurumi No Sew Bunny

Theo Amigurumi No Sew Bunny

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Single Crochet,
  • Color: Blue, Gray, White, Yellow,
Your First Crochet Beginner Sweater Pattern

Your First Crochet Beginner Sweater Pattern

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Caron Yarn,
  • Yarn Name: Caron Cakes,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet,
  • Color: Blue, Brown,
Flower Granny Bag

Flower Granny Bag

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: Knit Picks, WeCrochet,
  • Yarn Name: Upcycle Alpaca Blend Worsted,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Half Double Crochet, Single Crochet,
  • Color: Neutral,
Franny Granny Poncho

Franny Granny Poncho

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Knit Picks,
  • Yarn Name: Upcycle Alpaca Blend Worsted,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Single Crochet,
  • Color: Neutral,
Tweed Stacking Pumpkins

Tweed Stacking Pumpkins

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: WeCrochet,
  • Yarn Name: Brava Worsted,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
  • Color: Brown, Green, Orange,
Apple Crochet Coaster Pattern for Fall

Apple Crochet Coaster Pattern for Fall

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Yarnspirations,
  • Yarn Name: Lily Sugar’n Cream,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Half Double Crochet, Single Crochet, Slip Stitch,
  • Color: Red,
Crochet Dog Bed

Crochet Dog Bed

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Lion Brand,
  • Yarn Name: Re-Spekt Yarn,
  • Yarn Weight: Weight 3 – Light, Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Single Crochet, Slip Stitch,
  • Color: Brown, Neutral, Variegated,
Easy Crochet Ombre Shell Stitch Baby Blanket

Easy Crochet Ombre Shell Stitch Baby Blanket

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Lion Brand,
  • Yarn Name: Mandala,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Single Crochet,
Helen Shawl

Helen Shawl

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: Scheepjes,
  • Yarn Weight: Weight 2 – Fine,
  • Hook Size: 4.5 mm (7),
  • Stitches: Tunisian Purl Stitch, Tunisian Simple Stitch,
  • Color: Orange,
Crochet Backless Crop Top Pattern

Crochet Backless Crop Top Pattern

Free Crochet Pattern
  • Skill Level: 1. Basic,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Single Crochet, Slip Stitch,
Ela Facecloth Set

Ela Facecloth Set

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Stylecraft,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Tunisian Purl Stitch, Tunisian Simple Stitch,
  • Color: Pink,
Blossom Shawl

Blossom Shawl

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Mary Maxim,
  • Yarn Name: Mellowspun DK,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Half Double Crochet,
Deidra Sweater

Deidra Sweater

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: Knit Picks, WeCrochet,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7), 5 mm (H-8),
  • Stitches: Half Double Crochet, Half Double Crochet Back Loop, Single Crochet, Slip Stitch,
  • Color: Pink,
Misty Sunrise Shawl

Misty Sunrise Shawl

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Weight: Weight 1 – Super Fine,
  • Hook Size: 4.5 mm (7),
  • Stitches: Tunisian Knit Stitch, Tunisian Simple Stitch,
  • Color: Gray, Yellow,
Spring Crochet Scarf

Spring Crochet Scarf

Free Crochet Pattern
  • Skill Level: 1. Basic,
  • Yarn Weight: Weight 2 – Fine,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Half Double Crochet Two Together, Single Crochet,
Bingley Hat

Bingley Hat

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Mary Maxim,
  • Yarn Name: Mellowspun DK,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet, Half Double Crochet Back Loop, Slip Stitch, Slip Stitch Back Loop,
  • Color: Blue, Brown, Gray, White,
Mishelka Blanket

Mishelka Blanket

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Weight: Weight 2 – Fine,
  • Hook Size: 4.5 mm (7),
  • Stitches: Tunisian Simple Stitch,
  • Color: Pink,
Crochet Diamond Mesh Top

Crochet Diamond Mesh Top

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
  • Color: Green,
Herringbone Moss Sweater

Herringbone Moss Sweater

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: WeCrochet,
  • Yarn Name: Swish DK,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Herringbone Half Double Crochet, Moss / Linen, Single Crochet, Slip Stitch,
  • Color: Gray, Green, White,
Crochet Kitchen Towel

Crochet Kitchen Towel

Free Crochet Pattern
  • Skill Level: 2. Easy, 3. Intermediate,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4 mm (G-6), 4.5 mm (7),
  • Stitches: Half Double Crochet, Single Crochet, Slip Stitch,
  • Color: Gray, White, Yellow,
Herringbone Backpack

Herringbone Backpack

Free Crochet Pattern
  • Yarn Brand: Paintbox Yarn,
  • Yarn Name: Simply Aran,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet, Herringbone Half Double Crochet, Single Crochet, Slip Stitch,
  • Color: Brown, Neutral,
Christmas Mini Hat Ornaments Crochet

Christmas Mini Hat Ornaments Crochet

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet, Half Double Crochet Back Loop, Slip Stitch,
  • Color: Gray, Neutral,
Thermal Crochet Coaster

Thermal Crochet Coaster

Free Crochet Pattern
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Single Crochet, Single Crochet Back Loop,
  • Color: Brown, Orange, Yellow,


Common Questions About 4.5 mm (7)

Here we answer some common questions about 4.5 mm (7).

How many millimeters is the 7 sized crochet hook?

Answer: Unfortunately, crochet hook manufacturers have not kept this standard. Some #7 size hooks are 4.5mm while others are 4.75mm. Both of these are considered the correct size for a #7 US hook .