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.

Buy this hook on Amazon

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.

Herringbone Backpack

Herringbone Backpack

Free Crochet Pattern
  • Yarn Brand: Paint Box Yarns,
  • 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,
Abbey Blanket

Abbey Blanket

Free Crochet Pattern
  • Skill Level: 1. Basic,
  • Yarn Brand: Paint Box Yarns,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet, Single Crochet,
Chloe Tabard Top

Chloe Tabard Top

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: WeCrochet,
  • Yarn Name: Brava Worsted,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet,
  • Color: Gray,
Elongated Single Crochet Stitch

Elongated Single Crochet Stitch

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7), 5 mm (H-8),
  • Stitches: Single Crochet,
  • Color: Neutral,
Crochet Sheep Blanket

Crochet Sheep Blanket

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 3.25 mm (D-3), 4.5 mm (7),
  • Color: White,
Herringbone Moss Stitch Hat

Herringbone Moss Stitch Hat

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet,
  • Color: Green, Neutral,
Colourful C2C Pillow

Colourful C2C Pillow

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
Textured Crochet Neck Warmer Pattern

Textured Crochet Neck Warmer Pattern

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: Lion Brand,
  • Yarn Name: Feels Like Heaven,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet, Single Crochet, Triple Crochet,
  • Color: Pink,
Ridged Crochet Fingerless Gloves

Ridged Crochet Fingerless Gloves

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: WeCrochet,
  • Yarn Name: Comfy Worsted,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7), 5.5 mm (I-9),
  • Stitches: Single Crochet Back Loop,
  • Color: White,
The Flora Quilt

The Flora Quilt

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: WeCrochet,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
Herringbone Moss Mittens

Herringbone Moss Mittens

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,
  • Color: Pink,
How to Make a Crochet Half Circle

How to Make a Crochet Half Circle

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Lion Brand,
  • Yarn Name: Feels Like Heaven,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Single Crochet,
Crochet Seaside Tank Top

Crochet Seaside Tank Top

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Lion Brand,
  • Yarn Name: Coboo Yarn,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 3.5 mm (E-4), 4.5 mm (7),
  • Stitches: Single Crochet, Slip Stitch,
  • Color: Neutral,
Crochet Spiral Coasters

Crochet Spiral Coasters

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Single Crochet, Slip Stitch,
  • Color: White,
Crochet Round Placemats

Crochet Round Placemats

Free Crochet Pattern
  • Skill Level: 1. Basic,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Single Crochet, Slip Stitch,
  • Color: White,
Crochet Slouchy Beanie

Crochet Slouchy Beanie

Free Crochet Pattern
  • Skill Level: 1. Basic,
  • Yarn Brand: Lion Brand,
  • Yarn Name: Comfy Cotton Blend,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet, Half Double Crochet Back Loop, Single Crochet,
  • Color: Variegated,
Rustic Crochet Dishcloths

Rustic Crochet Dishcloths

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: WeCrochet,
  • Yarn Name: Dishie,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Single Crochet,
  • Color: Orange, White,
Weston Bobble Hat

Weston Bobble Hat

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet,
  • Color: Blue,
Widcombe C2C Crochet Hat

Widcombe C2C Crochet Hat

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: WeCrochet,
  • Yarn Name: Wool of the Andes Worsted,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet,
  • Color: Black, White,
Seeing Stripes Shawl

Seeing Stripes Shawl

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Rowan,
  • Yarn Name: Summerlite 4 Ply,
  • Yarn Weight: Weight 1 – Super Fine,
  • Hook Size: 4.5 mm (7),
  • Stitches: Tunisian Simple Stitch,
  • Color: Blue, Red,
Mirabilis Puff Stitch Beanie

Mirabilis Puff Stitch Beanie

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: WeCrochet,
  • Yarn Name: Kindred,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Puff,
  • Color: Orange,
Mannequin Shawl

Mannequin Shawl

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Weight: Weight 1 – Super Fine,
  • Hook Size: 4.5 mm (7),
  • Stitches: Tunisian Simple Stitch,
  • Color: Variegated,
Blessed Three Star Coaster

Blessed Three Star Coaster

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Tunisian Knit Stitch,
Martha’s Retro C2C Crochet Apron

Martha’s Retro C2C Crochet Apron

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Paint Box Yarns,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Color: Pink, Red,
Hawthorne V Neck Tee

Hawthorne V Neck Tee

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: WeCrochet,
  • Yarn Weight: Weight 2 – Fine,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Half Double Crochet,
  • Color: Gray,
Rainbow Granny Square Sweater

Rainbow Granny Square Sweater

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

Eleanor Sweater Scarf

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: WeCrochet,
  • Yarn Name: Swish DK,
  • Yarn Weight: Weight 3 – Light,
  • Hook Size: 4.5 mm (7),
  • Stitches: Half Double Crochet,
  • Color: Pink,
Cap Sleeve Crochet Top

Cap Sleeve Crochet Top

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: Lion Brand,
  • Yarn Name: 24/7 Cotton,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Herringbone Double Crochet,
  • Color: Purple,
Granny Stitch Ripple Blanket Baby Pattern

Granny Stitch Ripple Blanket Baby Pattern

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: Red Heart,
  • Yarn Name: Soft Baby Steps,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
  • Color: Gray,
Summer Nights Crochet Shawl

Summer Nights Crochet Shawl

Free Crochet Pattern
  • Skill Level: 3. Intermediate,
  • Yarn Brand: Lion Brand,
  • Yarn Name: Summer Nights,
  • Yarn Weight: Weight 1 – Super Fine,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Half Double Crochet, Single Crochet,
  • Color: Blue,
Mini Crochet Bow Pattern

Mini Crochet Bow Pattern

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Lion Brand,
  • Yarn Name: Vanna’s Choice,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet, Single Crochet,
  • Color: Pink,
Crochet Mesh Stitch Pattern

Crochet Mesh Stitch Pattern

Free Crochet Pattern
  • Skill Level: 2. Easy,
  • Yarn Brand: Lion Brand,
  • Yarn Name: Skein Tones,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Double Crochet,
How to Crochet a Single Crochet Blanket

How to Crochet a Single Crochet Blanket

Free Crochet Pattern
  • Skill Level: 1. Basic,
  • Yarn Brand: Red Heart,
  • Yarn Name: Gumdrop,
  • Yarn Weight: Weight 4 – Medium,
  • Hook Size: 4.5 mm (7),
  • Stitches: Single Crochet,
  • Color: Pink, Purple,


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 .