Your Marine Officer (2nd Lt) Uniform Regulations in Plain English
Disclosure: As an Amazon Associate, this site earns from qualifying purchases. Links to Amazon on this page are affiliate links — if you buy through them, the blog earns a small commission at no extra cost to you. It’s how we keep the lights on. Semper Fi.
Thank you to Jack and co at FexGear.com for building this detailed guide to the Marine Corps officer uniform regulations for Lieutenants far and wide.
Service Alpha Uniform: The Green Ones
See the official Marine Corps Uniform Regulations here, MCO P1020.34G W CH 1-5.
At present, this guide covers only the Service “A”, aka “alpha” uniform setup for newly-commissioned Marine Corps officers. See a tutorial on setup for the dress blue alpha uniform at FexGear.com.
Service A Uniform Regulations: the Uniform for Checking In

When reporting to your first duty station you should not stress over checking in. Depending on your assignment (PTAD or TBS), it will mostly consist of a good deal of paperwork, a few briefings with unit personnel, and unpacking. Just ensure you uniform is squared away (follow the tutorial below), haircut is in regulation, and you have copies of your orders, driver’s license, small notepad and a black pen. It also wouldn’t hurt to bring a small snack and a bottle of water as well.
Below is a step-by-step picture tutorial on how to properly set up your uniform and groom yourself prior to reporting:
HAIRCUT/SHAVE
- Less than 3 inches in length
- Bulk of hair less than 2 inches
- Faded at hairline from 0 length
- Clean shaven on face and neck (don’t check in with an in-regs mustache)
Hair will be neat and closely trimmed. The hair may be clipped at the edges of the side and back and will be evenly graduated all the way around the head (blended or faded and not edged as an outline) from zero length at the hairline in the lower portion of the head to the upper portion of the head. Hair will not be over 3 inches in length fully extended (an extended hair, not the style, determines proper length) on the upper portion of the head. The bulk of the hair shall not exceed approximately two inches. Bulk is defined as the distance that the mass of hair protrudes from the scalp when styled. The back and sides of the head below the hairline may be shaved to remove body hair. MARADMIN 504/07
Page 1-10 (MCO P1020.34G W CH 1-5)
SERVICE ALPHA JACKET
- Service belt extends to wearer’s left
- Service belt covers bottom button of coat
- Service belt’s tapered end extends 2 ¾ in to 3 ¾ in beyond buckle
- Buckle highly polished
The complete upper-half wear of the service alpha uniform. Notice how the belt buckle is aligned with service jacket outside edge (gig line).
Page 3-4 (MCO P1020.34G W CH 1-5)

- EGA insignias vertical
- EGA insignias anchors inboard
- EGA insignias wingtips parallel to bottom of coat
Likewise, the Eagle Globe and Anchor collar insignias are positioned vertically in the eyelets provided, anchors inboard, and wing tips parallel to bottom of the coat.
Page 4-9 (MCO P1020.34G W CH 1-5)

- Ribbons centered on left pocket
- Ribbons positioned 1/8 in above pocket top seam
Ribbon bars will be centered 1/8 inch above and parallel to the top edge of the upper left pocket of dress “B” coats, service coats, and men’s khaki shirts. When marksmanship badges are worn, ribbon bars will be centered over the pocket with the bottom edge of the ribbon bar 1/8 inch above the widest holding bar of the marksmanship badge(s).
Page 5-32 (MCO P1020.34G W CH 1-5)
- Rank insignia at midpoint center of shoulder
- Rank insignia 3/4 in from outside edge

Rank insignia is placed at the midpoint center of the shoulder-board positioned 3/4″ from the outer-most edge.
Page 4-23 (MCO P1020.34G W CH 1-5)
KHAKI LONG SLEEVE SHIRT UNIFORM REGULATIONS

- Rank insignia centered between top & bottom edge of collar
- Rank insignia 1 in from inside edge
- Rank insignia parallel to inside edge
- Always wear shirt-stays with khaki shirts
Collar grade insignia will be worn on both sides of the collar of khaki shirts. When the service “A” uniform is worn by officers, the wear of the collar insignia is required at all times. The insignia will be centered between the top and bottom edge of the collar, with the outer edge of the insignia one inch from the front edge of the collar. When the shirt collar is buttoned up the insignia will be parallel to the collar edge.
Page 4-22, 4-26 (http://www.marines.mil/Portals/59/Publications/MCO%20P1020.34G%20W%20CH%201-5.pdf)
NECKTIE

- Half Windsor knot
- Tie clasp worn on lower half of tie between 3rd and 4th buttons from top
- Dimple at base of knot preferred
Page 3-21 (MCO P1020.34G W CH 1-5)
TROUSERS

- Trouser legs have slight break over shoe in front
- Trouser legs reach 1/4 in above or below shoe welt in rear
- Trouser hems 2-3 in wide
- Trouser crease at center front and rear of each leg
- Trouser crease extends from bottom of hem to 2 inches above trouser crotch
Not much to explain here as the Marine Shop or TBS Uniform shop already tailor your trousers to conform to the established standards. Just ensure they’re wrinkle free and exhibit the proper crease standards as shown in the above photo and in the order below.
Page 3-32 (MCO P1020.34G W CH 1-5)
BELT

- Web belt
- Highly polished
- Tip of belt on wearer’s left
- Tip extends 2-4 in beyond buckle
The tip end of the web belt will pass through the buckle to the wearer’s left and will extend from 2 to 4 in beyond the buckle
Page 3-4 (MCO P1020.34G W CH 1-5)
GARRISON CAP



- Centered squarely on head
- Top slit unbroken
- Base of sweatband 1in above eyebrows
- Rank insignia bisected by flap
- Rank insignia bisects flap arch
The left service collar insignia will be worn on the left front side of the garrison cap, with the insignia centered vertically in the eyelet provided. Collar grade insignia will be worn on the right side of the garrison cap opposite to the branch of service collar insignia, with the insignia placed at a point midway on the arc of the flap and the flap generally bisecting the insignia.
Page 4-9, 4-26 (MCO P1020.34G W CH 1-5)
SHOES/SOCKS
- Standard corfam or shined low quarter shoe
- Black socks
As always please don’t hesitate to reach out to us in our Contact section with any questions, comments, or concerns you might have.
Thanks again to the team at FEXGear.com for this excellent Marine Officer Uniform Regulations guide! Check out their advice for Lieutenants on OCS, TBS and beyond.
Related Posts

Help! I think I’m below average–how do I get selected for OCS?
Thank you to West Texas+New Mexico OSO Captain Wisotzkey for sharing his advice to candidates who lack the perfect credentials. As an OSO, one of the most common questions I get from applicants is “how do I make myself more competitive for a selection board?” Sometimes this is due to the applicant wanting to crush the competition, but more often than not, it’s because they … Continue reading Help!

Why The First Salute?
The first salute also called the “Silver Dollar Salute” is one of the most important traditions in a new Marine Officers commissioning ceremony. Who gives the first salute? The first salute lives on as a tradition to honor the enlisted service member who has had the most impact on you. Many candidates choose a Sergeant Instructor they were particularly impressed with or ask a family member or … Co

Our Top Ten Most Popular Posts in 2017
Over the past year, these are the most-viewed posts on the entire site. Not all of these posts were written within the past year, although many get regularly updated. From least-viewed to most, here are the top ten posts of 2017: Number 10: Remember a Silver Dollar for Your First Salute The first salute a newly commissioned officer receives is a special moment. Naval tradition … Continue reading O

