









Dimetrodon was a large synapsid that lived approximately 295 to 272 million years ago during the Early Permian period - well before the first dinosaurs and not actually a dinosaur despite the popular association. Dimetrodon belongs to the synapsid lineage that gave rise to mammals, making it more closely related to modern mammals than to any dinosaur or other reptile. The distinctive tall dorsal sail of Dimetrodon, supported by elongated neural spines, is one of the most recognisable features of early vertebrate fossils and has been the subject of decades of functional reconstruction debate - the sail probably functioned in both thermoregulation and species recognition and display, with the precise balance between functions varying across the multiple Dimetrodon species described. Dimetrodon was an apex predator in the Permian ecosystems of what is now Texas, Oklahoma, and surrounding regions, taking prey including amphibians, other synapsids, and smaller predators of the era. This tee puts a bold Dimetrodon print on soft cotton.
Cut from 100% cotton with a ribbed knit collar that holds its shape wash after wash. Taped shoulders prevent the neckline from distorting over time, and dual side seams maintain the garment structure consistently. The Dimetrodon print is applied at high resolution so the sail-backed prehistoric silhouette comes through accurately and stays vivid after machine washing and tumble drying.
This tee works for Dimetrodon fans, palaeontology enthusiasts, and any girl who finds the placement of Dimetrodon in the synapsid lineage leading to mammals one of the more frequently misunderstood facts of prehistoric vertebrate phylogeny. It suits casual everyday wear, science events, and any occasion where Dimetrodon appreciation is worth expressing.
Machine wash cold and tumble dry low. The shirt runs true to size. Durable enough for regular use without fading.
Order yours and confirm the Dimetrodon appreciation today.
Returns
Contact us at hello@gooddszeei.com with your order number and reason for return.
We’ll provide a return shipping label (if applicable) or instructions for sending the item back.
Once we receive and inspect the item, we’ll notify you about the approval of your return.
Refunds
Damaged or Defective Items
If your item arrives damaged or defective, please reach out within 7 days of delivery with photos of the issue. We’ll replace it free of charge or issue a full refund, including shipping costs.
Shipping Costs
Questions?
Email us at hello@gooddszeei.com, and we’ll help you make things right, as swiftly as a cheetah!
Information We Collect
We may collect:
How We Use Your Information
How We Protect Your Data
Sharing Your Information
We do not sell your personal data. We may share it with:
Cookies
We use cookies to enhance your browsing experience (e.g., remembering your cart). You can opt out via your browser settings, but this may affect site functionality.
Your Rights
Third-Party Links
Our site may contain links to external sites (e.g., social media). We’re not responsible for their privacy practices.
Children’s Privacy
Our services are not intended for anyone under 13. We do not knowingly collect data from children.
Changes to This Policy
We may update this policy to reflect changes in our practices or legal requirements. Updates will be posted here with the date revised.
Contact Us
Questions about your data? Reach out at hello@gooddszeei.com, and we’ll respond faster than a galloping zebra!
Last Updated: October 25, 2025
| XS | S | M | L | XL | 2XL | |
|---|---|---|---|---|---|---|
| Width, in | 16.00 | 18.00 | 20.00 | 22.00 | 24.00 | 26.00 |
| Length, in | 27.00 | 28.00 | 29.00 | 30.00 | 31.00 | 32.00 |
| Sleeve length, in | 7.99 | 8.23 | 8.50 | 8.74 | 9.02 | 9.25 |
| Size tolerance, in | 1.50 | 1.50 | 1.50 | 1.50 | 1.50 | 1.50 |
| XS | S | M | L | XL | 2XL | |
|---|---|---|---|---|---|---|
| Width, cm | 40.64 | 45.72 | 50.80 | 55.88 | 60.96 | 66.04 |
| Length, cm | 68.58 | 71.12 | 73.66 | 76.20 | 78.74 | 81.28 |
| Sleeve length, cm | 20.30 | 20.90 | 21.60 | 22.20 | 22.90 | 23.50 |
| Size tolerance, cm | 3.81 | 3.81 | 3.81 | 3.81 | 3.81 | 3.81 |
Each gooddszeei T-shirt features vibrant, high-quality animal-inspired prints designed with creativity and comfort in mind. Our designs are exclusive and not mass-produced, so you’ll always stand out.
We use premium 100% cotton or cotton-blend fabrics that are soft, breathable, and durable — perfect for everyday wear in the Australian climate.
Each product page includes a detailed size chart. We recommend checking your measurements before purchasing to ensure the best fit.
Turn your T-shirt inside out, wash in cold water, and avoid using bleach. Hang to dry or tumble dry on low for best results.
Yes! Our prints use high-quality inks and printing techniques that resist fading even after multiple washes.
Absolutely! We offer fast and reliable delivery all over Australia, including rural areas.
Orders are usually processed within 1–2 business days and delivered within 5–8 business days depending on your location.
Yes. We offer easy 30-day returns or exchanges for unworn, unwashed items with tags still attached. Visit our Returns Policy page for details.
We occasionally accept custom requests for animal-print variations or bulk orders. Feel free to contact our support team for more information.
You can reach us via our contact form or email at support@gooddszeei.com. Our friendly team will respond within 24 hours.
Thanks for subscribing!
This email has been registered!