Question

Shoulder blade is measured at ______ of centre back length.

• A. $1/8^{\text{th}}$
• B. $1/2^{\text{th}}$
• C. $2/3^{\text{rd}}$
• D. $1/4^{\text{th}}$

Hint:

The fractional formula for locating back bodice horizontal guidelines from the nape of the neck is:
$$\text{Neck/Shoulder} = \frac{1}{8} \cdot \text{CB}, \quad \text{Shoulder Blade Line} = \frac{1}{4} \cdot \text{CB}, \quad \text{Armhole/Bust Line} = \frac{1}{2} \cdot \text{CB}$$

Answer 1

The Correct Option is D

Step 1: Understanding Pattern-Drafting Fractions:
When drafting flat paper patterns for the bodice block, the Centre Back (CB) length is measured from the prominent nape of the neck down to the waist. To locate horizontal construction lines accurately, the CB length is divided into standard proportional fractions.

Step 2: Analyzing Anatomical Placement:

• Neckline/Shoulder Slope guides: Generally drafted at the upper $\frac{1}{8}^{\text{th}}$ level of the CB length.
• Shoulder Blade Level: The shoulder blade (scapula) represents the widest bone protrusion of the upper back. In standard pattern drafting, the shoulder blade line is drawn horizontally at precisely one-fourth ($\frac{1}{4}^{\text{th}}$) of the total CB length down from the neck nape.
• Chest/Underarm/Bust Line: Drafted further down, typically at $\frac{1}{2}$ or $\frac{1}{3}$ of the CB length.

Step 3: Verification:
Based on CBSE pattern-making guidelines, the standard fraction for measuring the level of the shoulder blade is $1/4^{\text{th}}$ of the centre back length.