Graduation day is one of those once-in-a-lifetime moments. The photos, the smiles, the tassel flip—everything matters. And right at the center of it all sits the iconic mortarboard cap. But have you ever stopped to think about mortarboard cap dimensions? Surprisingly, those measurements play a big role in comfort, appearance, and even confidence.
Let’s break it all down in plain, simple language.
What Is a Mortarboard Cap?
A mortarboard cap is the flat, square academic cap traditionally worn during graduation ceremonies. Its name comes from its resemblance to a bricklayer’s mortarboard tool. It usually includes a flat square board, a skull cap underneath, a center button, and a tassel.
Why Dimensions Matter
Think of the mortarboard like a picture frame. If it’s too big, it looks awkward. Too small, and it feels off-balance. Proper dimensions ensure:
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A balanced look in photos
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Comfortable wear for long ceremonies
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Correct tassel placement
Standard Mortarboard Cap Dimensions
Typical Cap Board Size
The most common mortarboard cap board dimension is:
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9 inches x 9 inches (approximately 23 cm x 23 cm)
This square size has become the global standard for most graduation ceremonies.
Standard Square Shape Explained
The flat square is designed to sit evenly on the head, with equal overhang on all sides. This symmetry is what gives mortarboards their clean, academic look.
Measurements in Inches
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Length: 9 inches
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Width: 9 inches
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Thickness: 2–3 mm (board only)
Measurements in Centimeters
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Length: 23 cm
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Width: 23 cm
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Thickness: 0.2–0.3 cm
Mortarboard Cap Size vs Head Size
One-Size-Fits-All Concept
Here’s the interesting part: mortarboard caps are mostly one-size-fits-all. The board stays the same size, while the inner skull cap adjusts to your head.
Elastic and Adjustable Headbands
Most caps include:
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Elastic bands
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Drawstrings
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Velcro adjustments
These features help the cap fit head circumferences ranging from 21 to 24 inches (53–61 cm) comfortably.
Graduation Levels and Cap Dimensions
High School Mortarboard Dimensions
High school mortarboards usually follow the same 9×9 inch standard. The difference lies more in fabric quality than size.
Bachelor’s Degree Cap Dimensions
Bachelor’s caps stick closely to standard dimensions, focusing on lightweight materials for comfort.
Master’s Degree Cap Dimensions
Master’s mortarboards are often identical in size but may include:
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Higher-quality fabric
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Thicker buttons
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Longer tassels
Doctoral Cap Differences
Doctoral graduates sometimes wear tam-style caps instead of mortarboards. When mortarboards are used, dimensions may increase slightly to 9.5 x 9.5 inches for a more formal look.
Materials Used and Their Impact on Dimensions
Cardboard vs Plastic Boards
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Cardboard boards: Lightweight but prone to bending
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Plastic boards: Slightly heavier but more durable
Both maintain the same dimensions, but plastic boards hold shape better over time.
Fabric Covering Thickness
The fabric (usually polyester or matte satin) adds minimal thickness—about 1–2 mm—without altering overall size.
Tassel Placement and Button Size
Center Button Dimensions
The center button typically measures:
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0.75 to 1 inch (2–2.5 cm) in diameter
This button anchors the tassel and keeps it centered.
Tassel Length Standards
Standard tassel length ranges from:
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9 to 12 inches (23–30 cm)
Longer tassels are common for higher academic levels.
Regional and Institutional Variations
US vs UK Mortarboard Sizes
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United States: 9×9 inches is standard
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United Kingdom: Slightly smaller boards, around 8.5 x 8.5 inches
Custom University Requirements
Some universities specify:
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Exact board size
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Tassel color placement
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Button material
Always check official guidelines before purchasing.
Custom Mortarboard Cap Dimensions
Decorative and Oversized Caps
For celebrations or photos:
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Oversized boards can reach 10–12 inches
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Used mainly for decoration, not official ceremonies
Personalized Caps for Photos
Custom designs usually stick to standard dimensions to maintain balance while allowing creativity.
How to Measure a Mortarboard Cap Correctly
Tools You Need
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Measuring tape or ruler
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Flat surface
Step-by-Step Measuring Guide
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Lay the cap flat
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Measure one side of the square
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Check thickness at the edge
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Measure tassel length from button to tip
Common Mistakes When Choosing Cap Size
Ignoring Head Circumference
Even with standard board dimensions, a poor-fitting skull cap can ruin comfort.
Overlooking Comfort and Balance
A cap that tilts or slips can distract you during the ceremony.
Mortarboard Cap Dimensions for Kids
Preschool and Kindergarten Sizes
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Board size: 8 x 8 inches
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Lighter materials for comfort
Teen Graduation Caps
Teen caps usually match adult dimensions but use smaller skull caps.
Buying Guide – Choosing the Right Mortarboard
Online vs In-Store Purchase
Online buying offers variety, while in-store purchases allow fit testing.
What to Check Before Buying
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Board size
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Adjustable headband
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Tassel attachment quality
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Fabric durability
Maintenance and Storage Without Warping
Proper Storage Techniques
Store flat in a box or hang using a cap hanger.
Avoiding Bent Corners
Never stack heavy items on top of the cap.
Conclusion
Mortarboard cap dimensions may seem like a small detail, but they make a big difference. From the standard 9×9-inch board to tassel length and head fit, every measurement contributes to comfort, style, and tradition. Whether you’re a student, parent, or event organizer, understanding these dimensions ensures graduation day goes smoothly—and looks great in photos too.
FAQs
1. What is the standard mortarboard cap size?
The standard size is 9 x 9 inches (23 x 23 cm).
2. Are mortarboard caps adjustable?
Yes, most include elastic or adjustable headbands.
3. Do mortarboard dimensions differ by degree level?
Usually no, though doctoral caps may vary slightly.
4. Can I customize my mortarboard cap size?
Yes, custom and decorative caps are available, but standard sizes are recommended for ceremonies.
5. Are children’s mortarboard caps smaller?
Yes, kids’ caps typically measure around 8 x 8 inches.
