Shoulder Width

Along the back, measure from one acromions lateral edge to the other acromions lateral edge.

To find the lateral edge of the acromion, follow these steps:

1. Locate the acromion: The acromion is a bony projection on the scapula (shoulder blade) that forms the highest point of the shoulder. It can be felt at the top of the shoulder, near the joint where the shoulder meets the collarbone (clavicle).

2. Identify the lateral edge: Once you've located the acromion, the lateral edge refers to the outermost edge of the acromion. You can feel for the bony prominence and identify its outermost point, which corresponds to the lateral edge.

3. Measure: Use a tape measure to measure the distance from one lateral edge of the acromion to the other. 

Neck Circumference

Measure the neck around the C-4/C-5 area and below the Adam's apple (for men).

1. Identify the C-7 Vertebra: Tilt your head forward and locate the most prominent bony bump at the base of your neck—this is the seventh cervical vertebra 

2. Find the C-4/C-5 Area:

1. The C4-C5 vertebrae are located in the cervical spine, just above C7.
2. The C4-C5 disc level is approximately 1.5 to 2 inches above C7 for most adults.
3. In terms of finger width, this is typically 2 to 3 finger widths above C7, depending on hand size.

3. Position the Tape Measure: Wrap a flexible tape measure around the neck at the C-4/C-5 level, ensuring it is parallel to the ground and snug but not too tight against the skin.

4. Adjust for the Adam’s Apple (Men): For men, ensure the tape measure is placed just below the Adam’s apple while still aligning with the C-4/C-5 level on the back of the neck.

Neck Height

Measure from the bottom of the mastoid process behind the ear diagonally down to the acromions lateral edge.

To identify the Mastoid Process, follow these steps:

1. The mastoid process is a bony prominence located behind the earlobe, towards the back of the skull. Gently feel behind your earlobe to find the mastoid process. It typically feels like a small, rounded bump.

2. With the mastoid process identified, hold one end of a flexible tape measure at the bottom of the mastoid process. Ensure the tape measure is positioned against the skin.

3. Diagonal Measurement: Extend the tape measure diagonally downwards in a straight line towards the shoulder to reach the lateral edge of the acromion, which is the outermost point of the shoulder.

Sleep Position & Mattress Firmness

Indicate the predominant sleeping position and choose the mattress firmness.

Determine which position you most commonly fall asleep in or spend the majority of the night in, such as back, side, or stomach. 

To better understand the characteristics of each firmness option, choose the one that best describes your mattress:

1. Soft: Offers a plush and cushioned feel, provides a sinking or "hugging" sensation and is ideal for those who prefer to feel cradled by their mattress.

2. Medium: Strikes a balance between softness and support, offers both cushioning and underlying firmness, and provides a comfortable yet supportive surface.

3. Firm: Offers a solid and supportive feel, provides minimal sinkage and a firmer surface and offers optimal support for the spine and joints.