2025 Not Flat We Checked Ugly Christmas Sweater
2025 Not Flat We Checked Ugly Christmas Sweater
Not Flat We Checked Ugly Christmas Sweater
Not Flat We Checked Ugly Christmas Sweater1

2025 Not Flat We Checked Ugly Christmas Sweater

$39.95

Size Guide

Size Chart

SIZE LENGTH BUST SHOULDER SLEEVE
S 26.0 in 40.0 in 17.0 in 26.0 in
M 28.0 in 44.0 in 18.0 in 27.0 in
L 28.0 in 48.0 in 19.0 in 27.0 in
XL 30.0 in 52.0 in 20.0 in 28.0 in
2XL 30.0 in 56.0 in 21.0 in 28.0 in
3XL 31.0 in 60.0 in 22.0 in 28.0 in
4XL 32.0 in 64.0 in 24.0 in 29.0 in
5XL 33.0 in 68.0 in 25.0 in 29.0 in
6XL 34.0 in 73.0 in 26.0 in 29.1 in
  • Material: 95% Polyester - 5% Spandex.
  • Printing technique: dye-sublimation.
  • Coarse Needle Drawing 270g.
SIZE LENGTH BUST SHOULDER SLEEVE
S 67 cm 102 cm 42 cm 67 cm
M 70 cm 112 cm 45 cm 68 cm
L 72 cm 122 cm 48 cm 69 cm
XL 75 cm 132 cm 51 cm 70.5 cm
2XL 76 cm 142 cm 54 cm 71 cm
3XL 79 cm 152 cm 57 cm 71.5 cm
4XL 82 cm 162 cm 60 cm 72.5 cm
5XL 85 cm 172 cm 63 cm 73 cm
6XL 86 cm 182 cm 66 cm 74 cm
  • Material: 95% Polyester - 5% Spandex.
  • Printing technique: dye-sublimation.
  • Coarse Needle Drawing 270g.
SIZE LENGTH CHEST AGE (Years) SUGGESTED
2T 14.0 in 11.0 in 1-2 33-35 in
3T 15.0 in 12.0 in 2-3 36-39 in
4T 16.0 in 13.0 in 3-4 39-41 in
4 16.5 in 13.5 in 4-5 42-44 in
5 17.0 in 14.0 in 5 45-47 in
XS 18.0 in 15.0 in 6-8 48-50 in
S 19.0 in 15.5 in 8-10 50-54 in
M 21.0 in 16.0 in 10-12 54-58 in
L 23.0 in 18.0 in 12-13 58-62 in
XL 25.0 in 19.0 in 13-15 62-68 in
  • Material: 95% Polyester - 5% Spandex.
  • Printing technique: dye-sublimation.
SIZE LENGTH CHEST AGE (Years) SUGGESTED
2T 35.6 cm 27.9 cm 1-2 83.8-88.9 cm
3T 38.1 cm 30.5 cm 2-3 91.4-99.1 cm
4T 40.6 cm 33.0 cm 3-4 99.1-104.1 cm
4 41.9 cm 34.3 cm 4-5 106.7-111.8 cm
5 43.2 cm 35.6 cm 5 114.3-119.4 cm
XS 45.7 cm 38.1 cm 6-8 121.9-127.0 cm
S 48.3 cm 39.4 cm 8-10 127.0-137.2 cm
M 53.3 cm 40.6 cm 10-12 137.2-147.3 cm
L 58.4 cm 45.7 cm 12-13 147.3-157.5 cm
XL 63.5 cm 48.3 cm 13-15 157.5-172.7 cm
  • Material: 95% Polyester - 5% Spandex.
  • Printing technique: dye-sublimation.
  • $0.00
Almost gone. There are only 10 left.
This February, we only do 26 pieces of this limited edition. Get it before it's gone!
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Estimated arrival: Place your order today (standard shipping method) to receive the product(s) within Dec 02 - Dec 04

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Nov 19

Nov 24 - Nov 26

Dec 02 - Dec 04

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Make a bold statement this season with the Not Flat We Checked Ugly Christmas Sweater. Featuring a cheeky nod to scientific truth and space exploration, this design blends humor with curiosity—perfect for thinkers, skeptics, and lovers of cosmic conversation.

Not Flat, We Checked – The Sweater That Defies Gravity

The phrase “Not Flat” echoes centuries of astronomical discovery, from Eratosthenes’ shadow experiments to satellite imaging. This sweater channels that legacy, poking fun at conspiracy culture while reaffirming the power of observation and evidence-based thinking.

Not Flat We Checked Ugly Christmas Sweater
Not Flat We Checked Ugly Christmas Sweater

“WE CHECKED” isn’t just a punchline—it’s a tribute to explorers, physicists, and astronauts who’ve pushed boundaries. From Galileo’s telescope to Apollo missions, the truth about Earth’s shape has been verified by minds who dared to question and measure.

This design resonates with a generation raised on science memes and space documentaries. It’s a wearable wink to those who value facts, enjoy playful rebellion, and aren’t afraid to challenge outdated ideas with a bit of seasonal flair.

Shipping Policy & Manufacturing Info

Our shirts are made when ordered. Due to the time variability of on-demand manufacturing, we offer 2 options for how quickly you want to receive your order. You can select from the following choices in checkout.

Standard Shipping ($4.99+)

  • Orders using this option generally arrive 5-10 days (U.S. orders) and it takes 2 weeks for International orders after being manufactured and shipped. (See notes below)
  • Manufacturing times for this option vary more around busier times of the year or during extreme circumstances such as covid-19 shutdowns.

Shipping and expedited manufacturing ($19.99+) (U.S. Only)

  • Orders using this option jump to the front of the manufacturing queue which can generally save a couple days (or more during busier times of the year).
  • It's highly recommended to use this option if you are ordering for a specific event or holiday.
  • Orders using this option generally arrive 2-3 days after being manufactured and shipped. (U.S. only)
  • Orders using expedited manufacturing will be printed when the next batch of orders are processed which can vary depending on seasonality and other factors.

Please Note:

  • We do not guarantee shipping or arrival dates.
  • Manufacturing during the majority of the year takes between 1-5 business days (Mon-Fri) however can take more than a week during the heaviest shopping times of the year. Extreme circumstances such as covid-19 may delay order manufacturing and/or shipping by an additional week or more.
  • All manufacturing and shipping times mentioned are just estimates and will vary.
  • Some of our popular designs may be pre-printed and may ship out faster than less commonly ordered designs/style/color combinations.