Standard Blanket Size Reference Table
| Blanket Type | Dimensions (Inches) | 4" Squares Needed | 6" Squares Needed |
|---|---|---|---|
| Baby / Stroller | 30" × 36" | 8 × 9 = 72 | 5 × 6 = 30 |
| Lapghan | 36" × 48" | 9 × 12 = 108 | 6 × 8 = 48 |
| Standard Throw | 50" × 60" | 12 × 15 = 180 | 8 × 10 = 80 |
| Twin Bed | 66" × 90" | 16 × 22 = 352 | 11 × 15 = 165 |
| Queen Bed | 90" × 108" | 22 × 27 = 594 | 15 × 18 = 270 |
Frequently Asked Questions
- How many granny squares do you need for a standard throw blanket?
- For a standard 50" × 60" throw blanket using classic 4-inch granny squares, you will need approximately 180 squares arranged in a 12 × 15 grid. If using larger 6-inch squares, you will need approximately 70 to 80 squares (arranged in an 8 × 10 grid).
- How much yarn does it take to join granny squares together?
- Joining typically consumes between 1.5 to 4.5 times the total seam length depending on your method. An invisible mattress stitch uses about 1.3 yards of yarn per yard of seam, a slip stitch join uses about 2.5 yards, while a single crochet or flat braid join uses 3.5 to 4.8 yards per yard of seam.
- Should you block granny squares before joining them?
- Yes, absolutely! Blocking your squares with a wooden blocking board and stainless steel pins squares up the corners and equalizes edge tension. When every square is uniform in size, joining seams lies completely flat without puckering or twisting.
- How do you calculate the border yardage for a granny square afghan?
- Calculate the perimeter of the blanket in yards: 2 × (Width + Length) ÷ 36. Multiply the perimeter by the number of border rounds, then multiply by the stitch consumption factor (typically 2.8 yards of yarn per yard of perimeter for single or half double crochet rounds).