US Marine O3 Shoulderboard Vertical T-Shirt - Design Description
Design Overview
This design showcases the insignia of a U.S. Marine Corps Captain (O-3) as a vertical shoulder board, a formal element of the Marine Corps uniform. The artwork presents this insignia in a clear, heraldic style, instantly identifying the rank and branch of service.
Visual Elements and Symbolism
The central element of the design is the rank insignia: two vertically aligned silver bars. These bars, positioned centrally, are the visual representation of a Captain's rank within the Marine Corps officer corps. They are the primary indicator of the wearer's seniority among company-grade officers.
The background mimics the deep navy blue or black field found on the actual shoulder board, reflecting the naval heritage of the Marine Corps. Encircling the rank device is a gold embroidered border, a traditional marker of commissioned officer status and authority. This gold trim adds a touch of prestige and distinction to the design.
Completing the design is the gold Marine Corps button, bearing the iconic Eagle, Globe, and Anchor (EGA) emblem. This prominent detail serves as a critical identifier, signifying the wearer’s affiliation with the United States Marine Corps and differentiating it from the insignia of other branches. The EGA button reinforces the Marine Corps identity.
The overall presentation, capturing the specific form and symbolism of the O-3 vertical shoulder board, directly and proudly denotes a U.S. Marine Corps Captain.
Unisex Heavy Cotton T-Shirt
A reliable classic cotton tee built for comfort, durability, and style. This unisex heavy cotton shirt is the perfect everyday staple — soft, structured, and designed to make printed designs look sharp and vibrant.
Product Highlights
- 100% heavy cotton fabric for structure and comfort
- Smooth surface ensures vivid, long-lasting prints
- No side seams for irritation-free wear
- Reinforced shoulders to maintain shape over time
- Classic unisex fit — works for all body types
Fit & Style Notes
Designed with versatility in mind, this tee works as your everyday go-to. Wear it true-to-size for a classic fit, or size up for a relaxed, modern drape. The mid-weight cotton balances softness and structure, making it equally great for layering or wearing on its own.
Style it with jeans, joggers, or skirts — its timeless silhouette makes it easy to dress up or down. Perfect for personal wear, printing, branding, or merch drops.
Size Guide
For best results, measure a t-shirt you already own laid flat and compare the chest width and length to the chart below.
| Size | Width (in) | Length (in) | Sleeve (in) |
|---|---|---|---|
| S | 18.00 | 28.00 | 15.10 |
| M | 20.00 | 29.00 | 16.50 |
| L | 22.00 | 30.00 | 18.00 |
| XL | 24.00 | 31.00 | 19.50 |
| 2XL | 26.00 | 32.00 | 21.00 |
| 3XL | 28.00 | 33.00 | 22.40 |
| 4XL | 30.00 | 34.00 | 23.70 |
| 5XL | 32.00 | 35.00 | 25.00 |
Tip: Compare these measurements with your favorite tee for the best fit.
Care Instructions
- Machine wash cold (max 30°C / 90°F)
- Use non-chlorine bleach only when necessary
- Do not iron directly on printed designs
- Do not dry clean
- Tumble dry on low heat
