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Avoid Parallel Fifths – Music Theory T-Shirt

Price range: $21.00 through $33.00 Price including tax

Size Guide
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About this item

Few music theory rules are as instantly recognizable as avoid parallel fifths. This shirt turns one of the most iconic lessons in harmony and counterpoint into a bold academic music theory tee for the musicians who know exactly why those intervals matter.

Designed with a clean red-and-black typographic layout and a notation-inspired theory reference, this shirt is a great gift for composers, arrangers, pianists, choir directors, AP Music Theory students, and classical musicians who appreciate a good inside joke. It’s perfect for lessons, rehearsals, practice rooms, theory class, and music school life.

Great for:

  • music theory teachers and professors
  • composition students and conservatory majors
  • choir directors, pianists, and accompanists
  • counterpoint lovers and harmony nerds
  • anyone who has ever corrected voice leading on sight

 

The 100% cotton unisex classic tee will help you land a more structured look. It sits nicely, maintains sharp lines around the edges, and goes perfectly with layered streetwear outfits. Plus, it’s extra trendy now!

• 100% cotton
• Sport Grey is 90% cotton, 10% polyester
• Ash Grey is 99% cotton, 1% polyester
• Heather colors are 50% cotton, 50% polyester
• Fabric weight: 5.0–5.3 oz/yd² (170-180 g/m²)
• Open-end yarn
• Tubular fabric
• Taped neck and shoulders
• Double seam at sleeves and bottom hem
• Blank product sourced from Honduras, Nicaragua, Haiti, Dominican Republic, Bangladesh, Mexico

Disclaimers:
• Due to the fabric properties, the White color variant may appear off-white rather than bright white.
• Dark color speckles throughout the fabric are expected for the color Natural.

This product is made especially for you as soon as you place an order, which is why it takes us a bit longer to deliver it to you. Making products on demand instead of in bulk helps reduce overproduction, so thank you for making thoughtful purchasing decisions!

• Traceability:
– Knitting—Honduras, the Dominican Republic
– Dyeing—Honduras, the Dominican Republic
– Manufacturing—Nicaragua, Honduras, Haiti, El Salvador, or the Dominican Republic
• Contains 0% recycled polyester
• Contains 0% dangerous substances

Age restrictions: For adults
EU Warranty: 2 years
Other compliance information: Meets the flammability, lead, cadmium, phthalates and formaldehyde level requirements.

In compliance with the General Product Safety Regulation (GPSR), Musictheory4u.com ensures that all consumer products offered are safe and meet EU standards. For any product safety related inquiries or concerns, please contact us at info@musictheory4u.com.

One printed Gildan 5000 Unisex Classic Tee featuring your selected Music Theory Shop design on the front.
Each shirt is printed to order through our print partner and made specifically for your order.

Your order includes:
1 unisex classic-fit t-shirt
front print featuring the selected design
your chosen color and size
professionally printed made-to-order apparel

Please note:
this listing is for one t-shirt
mockup styling props and accessories are not included
print placement may vary slightly from mockups depending on shirt size

This t-shirt is made to order and available in multiple sizes. Please check the size guide carefully before placing your order, as fit preferences vary from person to person. If you’re between sizes or prefer a looser fit, sizing up is often the safest choice. Measurements are provided to help you compare with a favorite shirt you already own.

Because this t-shirt is made to order, we recommend checking the size guide and your selected options carefully before placing your order. If your item arrives damaged, defective, misprinted, or with a clear fulfillment error, please contact us as soon as possible and, where possible, within 30 days of delivery. Include your order number and photos of the issue so we can review it and help with an appropriate solution. If your package appears lost in transit, please contact us within 30 days of the estimated delivery date. Requests relating to change of mind or incorrect size selection may be limited for made-to-order products, so please contact us before returning anything.

Each t-shirt is made to order after purchase rather than pulled from pre-printed stock. Production usually takes a few business days before shipping, and delivery times vary depending on destination, carrier, and seasonal demand. If your order includes multiple items, they may arrive in separate packages depending on how they’re fulfilled.

Because each shirt is made to order, please double-check your size, color, and shipping address before placing your order.

If you need help with an order issue, contact us as soon as possible and include:
your order number
a short description of the issue
photos if the item arrived damaged or incorrect

If your order has not entered production yet, we may be able to help with small changes. Once production has started, changes or cancellations may no longer be possible.

Need help choosing a size, understanding the design, or checking something before you order?

Feel free to reach out if you have questions about:
sizing and fit
shirt colors
print style and placement
music theory shirt gifts
order issues or product questions

We’re happy to help before you place an order if you’re unsure which option is right for you.

Product measurements (inches)


Gildan 5000 Unisex Classic Tee

Classic unisex fit. If you prefer a roomier fit, size up. Measurements may vary slightly by up to 2″ (5 cm).

Size Length Width Sleeve length
S 28 18 15 ⅝
M 29 20 17
L 30 22 18 ½
XL 31 24 20
2XL 32 26 21 ½
3XL 33 28 22 ¾
4XL 34 30 24 ¼
5XL 35 32 25 ¼

Fit note

  • Classic unisex fit
  • Runs true to size for most people
  • Size up for a roomier fit
  • Size down only if you prefer a closer fit

Suggested fit: Choose your usual size for a standard classic tee fit. Size up if you want a more relaxed or oversized look. If you are between sizes, sizing up is usually the safer choice.

Fit note
classic unisex fit
runs true to size for most people
size up for a roomier fit
size down only if you prefer a closer fit

Suggested fit
Choose your usual size for a standard classic tee fit.
Size up if you want a more relaxed or oversized look.
If you are between sizes, sizing up is usually the safer choice.

This item is made using print-on-demand production, which means your shirt is printed only after you place your order.

Why we use print on demand
it helps reduce overproduction and unnecessary waste
each item is made specifically for the customer who ordered it
it allows us to offer a wider range of designs, sizes, and colors without mass-producing inventory

Please note
colors may appear slightly different depending on your screen settings
print placement can vary slightly between sizes and garments
slight variations between mockups and finished products are normal in made-to-order printing

The Music Theory Shop creates apparel and gifts for people who genuinely enjoy the weirdly specific world of music theory, harmony, counterpoint, ear training, notation, and academic musician humor.

Our designs are made for:

  • music theory students
  • composers and arrangers
  • choir directors and music teachers
  • pianists, singers, and accompanists
  • classical musicians, harmony nerds, and Roman numeral enthusiasts

The goal is simple: make smart, niche music theory designs that feel wearable, funny, and actually worth owning.

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