Shirts On FI
Fi: Element of Freedom T-Shirt
Fi: Element of Freedom T-Shirt
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Finance-inspired apparel with a mission to support financial literacy.
Science meets Financial Independence in this clever twist on the periodic table. Featuring the fictional element "Fi" (the element of Freedom), with an atomic number of 25x and an atomic mass of 0.04—a subtle nod to the 4% rule and the 25x rule of FIRE. Whether you're a money nerd, a science geek, or just someone who values autonomy over authority, this shirt speaks your language. Because freedom isn’t just a concept—it’s elemental.
Size chart
Size chart
Most Shirts On FI tees are printed on the Bella+Canvas 3001 unisex tee. It runs true to size with a classic fit; size up if you are between sizes or prefer a looser fit. Measurements below are in inches, taken flat.
| Size | Chest width | Body length |
|---|---|---|
| XS | 16.5 | 27 |
| S | 18 | 28 |
| M | 20 | 29 |
| L | 22 | 30 |
| XL | 24 | 31 |
| 2XL | 26 | 32 |
| 3XL | 28 | 33 |
| 4XL | 30 | 34 |
| 5XL | 32 | 35 |
Tip: chest width is measured armpit to armpit. Double your favorite shirt's flat width to compare. Tank tops and hoodies use different blanks and may vary slightly; when in doubt, contact us before ordering, because printed-to-order items cannot be exchanged for size.
Shipping & returns
Shipping & returns
Printed just for you. Most orders are produced in 2 to 5 business days, with US delivery typically 2 to 7 business days after that. Wrong, damaged, or misprinted item? Contact us within 30 days and we will make it right. Full details: Shipping Policy and Refund Policy.
Product details & compliance
Product details & compliance
EU representative: HONSON VENTURES LIMITED, gpsr@honsonventures.com, 3, Gnaftis House flat 102, Limassol, Mesa Geitonia, 4003, CY
Product information: Bella+Canvas 3001, 2 year warranty in EU and Northern Ireland as per Directive 1999/44/EC
Warnings, Hazard: For adults, Blank product sourced from Honduras
Care instructions: Machine wash: cold (max 30C or 90F), Non-chlorine: bleach as needed, Tumble dry: low heat, Iron, steam or dry: medium heat, Do not dryclean
