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.

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,
Crochet Christmas Star Pattern

Crochet Christmas Star Pattern

Free Crochet Pattern
  • Skill Level: 1. Basic, 2. Easy,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Half Double Crochet, Single Crochet, Slip Stitch, Triple Crochet,
  • Color: Brown, Green, Neutral,


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 .