High-quality organic cotton, timeless design, and lovingly finished in Germany. Personal, durable, and the perfect meaningful gift—for yourself or others.
A classic-cut unisex kids' T-shirt with a modern twist. The cut is straight and fits true to size—not too tight and not too loose. If you're looking for a particularly relaxed fit, you can choose a size larger.
For the perfect fit: Measure your favorite T-shirt and compare it to our size chart.
Every shirt tells a story—and we're proud of every single one!
Personalized Premium T-Shirt Made from Organic Cotton - Oversized - 3 Designs
Personalized Premium T-Shirt Made from Organic Cotton - Oversized - 9 Designs
Personalized Premium T-Shirt Made from Organic Cotton - Unisex - 3 Designs
Personalized Premium Hoodie Made from Organic Cotton - 3 Designs
High-quality & sustainable
Great store, fast shipping, and no unnecessary plastic waste. The shirt looks really high-quality. - Hannah O.
Great birthday present
Really nice shirt, great quality, and fits exactly as described. It was a huge hit as a birthday gift 😀 Thanks!! - Anna H.
My absolute favorite
My absolute favorite! Just picking it out was fun, and the delivery and packaging were top-notch. The quality is great—nice and firm but really soft. It’s still great even after washing. I’m super excited 🤩 - Britta K.
FAQs
What does "organic cotton" mean?
Organic cotton is grown and processed without synthetic chemicals, genetic engineering, or harmful dyes. It is environmentally friendly, conserves water, and ensures better working conditions—as certified by standards such as GOTS. (Of course, this applies only to products that are explicitly made from organic cotton.)
Great product—but why isn't it cheaper?
We’re committed to top-notch quality and make our products to order—and that comes at a price. You’ll receive one-of-a-kind pieces that bring joy and are definitely not off-the-rack! Check back regularly for our seasonal sales and snag some great discounts. Order more and enjoy additional savings that we’re happy to pass on to you. 🌟
Which designs should I choose?
Choose designs that reflect the person’s personality or that connect you—from personal hobbies to shared experiences. This way, you can create a meaningful, personalized gift.
How do the fabrics feel?
Our size charts will help you choose the right size. Just grab one of your favorite pieces of clothing and compare the measurements. In general, our products run true to size.
Can I return a product?
Since our products are customized specifically for you, returns are not permitted under the statutory right of withdrawal (Section 312g(2)(1) of the German Civil Code (BGB)).
But don't worry:
We offer a 30-day satisfaction guarantee so you can order with confidence—even for personalized items.
✔ Isthe product damaged or defective?
→ We'll replace it hassle-free and without any questions asked.
✔Is the size not what you expected?
→ We’ll work with you to find a fair solution—such as an exchange or a gift card.
✔ Not quite what you expected?
→ Contact us—we’ll review your case personally and make sure you’re satisfied in the end.
So you can order with complete peace of mind—we stand behind every single product.
More customer testimonials
Customer Reviews
Overall rating: 4.9 / 5 based on 139 reviews.
The shirt was for my daughter. She was thrilled with it.
I really love this sweater. The quality is great! It's soft and fluffy on the inside, and the outer fabric feels really nice. My husband really likes it :)
We wanted some cool and unique hoodies for our tennis team, and we’re always thrilled to slip into these super comfortable, high-quality hoodies after a match day. We definitely recommend them!
I ordered these wonderful T-shirts for our girls' trip to the Allgäu. It was a surprise, and they were a huge hit. Top quality, great print, fast delivery. I'll definitely order from you again 😍
I’m absolutely thrilled! My entire experience with Studio Sonntag was positive in every way. Communication went smoothly, and all my requests were perfectly fulfilled.🥰✨ The personalized design options are extensive and creative.
The T-shirt itself is high quality—beautiful and charmingly designed. I was so excited to give it as a gift!🤗 The value for the price is truly unbeatable.
I can wholeheartedly recommend Studio Sonntag.
Thank you so much for this wonderful work!💖
Thanks for the fast delivery and the great quality. This is my second shirt now—I've washed the first one over and over, and it hasn't lost its shape at all.
The selection of designs makes it easy to find the right one.
Super-fast processing and delivery! The T-shirt was a gift and was an incredible hit! 🙏🏻 The quality is really good, too, and everything looks absolutely beautiful 😇
I'd love to order from there again! 🫶🏻
Great quality and fast shipping. I've already ordered some T-shirts.
It would be great if you could offer personalized printing on the front and back.
I'll definitely order again.
I don't think the print turned out very well—there's a small border at the top of the letters. Unfortunately, I can't send you a photo because I'm still going to give it as a gift, so I've already wrapped it.
I love the idea and the amazing selection of emojis. I could buy them endlessly.
I find that the sizes run a bit small, so unfortunately I had to reorder.
I'd love to see more color options for the fabrics and more styles for the T-shirts (e.g., V-neck, etc.).
It's another T-shirt, and I gave this one away.
The shirts are great quality and fit perfectly. No warping even after many washes, and no fading.
You make really nice clothes!!!
The quality of the T-shirts is really top-notch! The wide variety of symbols allows for very personalized combinations. I would like to see a few additions to promote inclusion. As for the T-shirt colors, I would have liked to see green as well. Nevertheless, it’s a great idea, and it’s been executed with high quality!
Create your own one-of-a-kind items in just a few steps—personalized, sustainable, and full of meaning. We promise you joy, quality, and risk-free ordering thanks to our satisfaction guarantee —with fast shipping and top-notch support should you ever need help.
An idea born of friendship
How it all began
The idea for Studio Sonntag came about when we wanted to do something nice for a mutual friend. We designed a personalized shirt for him, his wife, and each of his children, featuring matching designs. The enthusiasm and gratitude we received inspired us to make this customization option available to everyone.
We hope you enjoy browsing and designing—and we hope our products bring just as much joy to you and your loved ones!
Heiko & Sven Founders of Studio Sonntag
We'll help you right away
Do you need help, or do you have any questions or suggestions?
Fits true to size, with a comfortable, child-friendly cut.
➔
3–4 years
5–6 years /
110–116
7–8 years /
122–128
ages 9–11
/ 134–146
ages 12–13
/ 152–158
A
34
36
38
42
46
B
43
47
52
59
66
C
12
13
15
17
19
Measure a similar garment at home and compare the measurements with our size chart. If you're between sizes, choose the larger size for a looser fit or the smaller size for a tighter fit. Slight variations (±2 cm) are possible; measurements are provided for reference only.