Reversible Flutter Sleeve in Blue Plaid
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Sizing Guide
In General:
Bust | Natural Waist | Hips | |
XS | 31-32" | 24-26" | 34-36" |
S | 33-35" | 27-29" | 37-39" |
M | 36-37" | 30-31" | 40-41" |
L | 38-40" | 32-34" | 42-44" |
XL | 41-44" | 35-39" | 45-47" |
Specific Shirt Measurements
If you have a great-fitting shirt in your closet, comparing that to our measurements below might help narrow down a size.
Because these shirts are cut and sewn by humans, deviations from the measurements below can vary by 1/8"-1/4". This is industry standard. Please contact us if you receive a shirt that you feel is on the smaller or larger side of this deviation and we will happily send you another shirt to try!
REVERSIBLE FLUTTER SLEEVE
If you plan to wear the flutter on the v-neck side and have a larger bust, we recommend sizing up.
Bust (1/2) | Bottom (1/2) | Length | |
XS | 18" | 18.375" | 20.25" |
S | 19" | 19.625" | 21" |
M | 20" | 20.5" | 21.375" |
L | 21.5" | 22" | 21.875" |
XL | 23" | 23.75" | 22.75" |
HALF SLEEVE
The half sleeve will be more fitted in the shoulders, arms, and hips. If you are on the cusp for the hip measurements, you may consider going up a size—we have a few customers who wear a small in the flutter and balloon sleeve, but wear a medium in the half sleeve because of their hips. We also recommend sizing up if you like a looser, more casual fit.
Bust (1/2) |
Bottom (1/2) |
Length (front/back) | |
XS | 18.625" | 20" | 20.5"/27" |
S | 19.5" | 20.75" | 20.5"/27" |
M | 20.625" | 22" | 21"/27.625" |
L | 22" | 23.25" | 21.5"/28" |
XL | 23.875" | 25" | 22"/28.25" |
BALLOON SLEEVE
The balloon sleeve has a slightly larger bust circumference. Although its bottom opening is smaller than the half sleeve, it has more room in the hips due to its two 4" hip vents.
Bust (1/2) | Bottom (1/2) | Length (front/back) | |
XS | 18.75" | 19.5" | 21.125"/23.5" |
S | 19.625" | 20.25" | 21.125"/23.5" |
M | 20.75" | 21.5" | 21.875"/24" |
L | 22" | 22.875" | 22.25"/24.5" |
XL | 24" | 24.75" | 22.875"/25.125" |
BOYFRIEND CREW
The boyfriend crew is roomier in the chest and more fitted in the upper hips. Three snaps in the back allow for some customization in the hips: bottom circumference measurements below are shown for the smallest and roomiest settings.
Bust (1/2) | Bottom (min) | Bottom (max) | |
XS | |||
S | |||
M | |||
L | |||
XL |
If you are deciding between two sizes, we’d be happy to help! Email us at hello@fieldtripbrand.com or call/text us at (540) 208-1817.
A limited-edition version for spring/summer in a crisp, lightweight, organic menswear plaid. Like our other flutter sleeves, you can wear it four different ways—as a v-neck or a crew neck, with the flutter exposed for a feminine touch, or tucked under for a crisper look. We love that the flutter cleverly conceals “those” underarm areas in front and back. Looks great tucked and untucked.
This style is tailored in the shoulders and relaxed in the body.
It incorporates our five points of fit so you can bend, reach, and stretch all day in comfort.
We recommend taking your normal size. Size up if you have a larger chest and plan to wear it on the v neck side.
Model is 5'2" and wearing a size small.
100% Organic Cotton Poplin from one of Europe's finest mills.
Not your average poplin—ours is lightweight and soft with a beautiful matte finish.
Free from harmful chemicals like PFAS, PFOS, PFOA, PFC, DWR, and formaldehyde.
Weighing under 7 oz, this shirt is lightweight (but never see through) for superior breathability.
WASHING INSTRUCTIONS
Machine wash on cool with like colors.
Hang or lay flat to air dry. This fabric air dries in under 1.5 hours.
Low or medium iron if desired.
We offer $5 flat-rate shipping to the contiguous U.S. We typically use USPS and most packages arrive within 3-5 days.
We offer free returns when our original packaging is used. Read more about our shipping and returns here.
No harmful chemicals (learn more)
Made in the U.S. in small batches
Machine washable
Air dries in under 1.5 hours
Great for travel — super versatile + lightweight
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Thoughtful Design

Wear It Four Ways
The ultimate in versatility. This style reverses from a crew neck to a v neck, and the flutter can be worn exposed for a feminine touch or tucked under to create a crisp sleeveless shell.

Tailored, but Comfortable
On-shoulder seams and a clean finish neckline keep it polished, while a relaxed body and a large center pleat in the back allows for all-day movement and airflow.

Functional Flutter
Leave it to us to turn a pretty detail into something functional. The flutter is just wide enough to cover "those" underarm areas, yet narrow enough to tuck under and transform into a shell. It is also genius for layering—the flutter acts as a protective barrier between your underarms and your wool and cashmere.

Styling Notes
In the warmer months, this is our favorite for shorts, skirts, and denim. In the cooler months, it makes a sophisticated base layer under jackets and sweaters—both crew and v-neck styles—and is more refined than a tank, camisole, or bodysuit. Especially when you need to de-layer.