Our size guide will help you find the perfect fit. If you have any questions, please use the chat icon below.
Our underwear and top sfits true to size and are fitted, however if you like your underwear/tops a little more relaxed, please size up.
| WAIST SIZE | ||||||
S |
M |
L |
XL |
2XL |
3XL |
|
|
IN |
28-30 |
31-34 |
34-37 |
37-40 |
40-43 |
43-45 |
|
CM |
71-76 |
79-86 |
86-94 |
94-102 |
102-109 |
109-114 |
| CHEST SIZE | ||||||
S |
M |
L |
XL |
2XL |
3XL |
|
|
IN |
34-38 |
38-41 |
41-44 |
44-48 |
48-52 |
52-56 |
|
CM |
86-97 |
97-104 |
104-112 |
112-122 |
122-132 |
132-142 |
| WAIST SIZE | |||||
S |
M |
L |
XL |
XXL |
|
|
IN |
28-29 |
30-31 |
32-33 |
34-36 |
37-38 |
|
CM |
74-78 |
79-84 |
85-88 |
89-93 |
94-100 |
| WAIST SIZE | |||||
S |
M |
L |
XL |
XXL |
|
|
IN |
28-29 |
30-31 |
32-33 |
34-36 |
37-38 |
|
CM |
74-78 |
79-84 |
85-88 |
89-93 |
94-100 |
Anatomic Trunk
Its patented design is anatomically correct so your crown jewels can hang comfortably. The V-shaped seam defines your gluteus to look more maximus than ever. It feels so natural that you will forget you are wearing anything at all. This is the underwear you never knew you needed!
Superior comfort and design in men's shapewear.
*Exclusive patented design: USD874,090S
Overall rating: 4.2 / 5 from 6 reviews.
Super comfy, great fit, and sexy\! Definitely my new favorite underwear🔥🔥
Store owner replied: Hey, We are absolutely thrilled to hear that our Anatomic Trunk is your new favorite underwear and that you find it super comfy, with a great fit, and undeniably sexy! Your enthusiastic feedback truly brightens our day. We always strive to create products that combine comfort, style, and confidence, and it's wonderful to know we've hit the mark for you. Thanks again for your support.
My bum looked flatter with them on. I guess you need a round bum to start with, in order to get a "rounder" bum. Waste of money for me.
Store owner replied: Hey, We are truly sorry to learn that the Anatomic Trunk did not meet your expectations and that you felt it made your bum look flatter. We understand your disappointment when a product doesn't deliver the desired effect, especially when you are looking for specific enhancement. Your feedback is incredibly valuable to us as we continuously work to improve our product designs please contact our customer support team at your earliest convenience with your order details so we can look into this matter more thoroughly.
The best I've ever tried! The fabric is super comfortable, the designs and embroidery are very cute, I love them!
Store owner replied: Hey, We are absolutely thrilled to hear that our Anatomic Trunk is the best you've ever tried! It's wonderful to know you find the fabric super comfortable and appreciate the very cute designs and embroidery. Your positive feedback truly means a lot to us. Thanks again for your fantastic review and we look forward to serving you again at Rounderbum.
Diseño y corte muy cómodo, largo perfecto y tela de buena calidad
Store owner replied: Hola, Agradecemos mucho tus amables palabras sobre nuestro Anatomic Trunk. Nos complace enormemente saber que encuentras el diseño y el corte muy cómodos, que el largo es perfecto y que la tela es de tu agrado por su buena calidad. Tu satisfacción con estos detalles es muy importante para nosotros. Gracias de nuevo por compartir tu experiencia.
They always fit great and love the support
Store owner replied: Hey, We are absolutely delighted to hear such positive feedback about your Anatomic Trunk! It's wonderful to know that they always fit great and that you appreciate the support our products provide. Ensuring comfort and quality for our customers is very important to us. Thanks again for your kind words.
The fit and quality is exceptional! The mesh fabric is perfect for our hot humid summers here in the deep south. The cut makes everything look it's best...
Store owner replied: Hey, We're so pleased to hear that the Anatomic Trunk's fit and quality exceeded your expectations. It's wonderful to know that our mesh fabric is proving perfect for the hot, humid summers in your region, providing both comfort and style. We designed the cut to enhance appearance, so your feedback on this point is truly rewarding to read. Thank you for sharing your fantastic experience.
Men’s shapewear is on the rise — and for good reason.
More guys are asking, “Why should only women have these options?” From all walks of life, men are shopping shapewear to look and feel their best. Whether it’s smoothing love handles, lifting your butt with padded underwear, improving posture, or recovering post-surgery — men’s shapewear does it all. And let’s be honest — who doesn’t want a more toned, confident look?
There’s nothing wrong with wanting to feel your best — and men’s shapewear can help.
It’s great for improving posture, supporting post-surgery recovery, and boosting confidence for special events like weddings. Whether you’re looking for a more lifted look or just want extra comfort during long days, our men’s padded underwear delivers both support and style.
At Rounderbum, our goal is to help men everywhere feel great with shapewear.
But it does more than just boost confidence — our padded briefs add lift and volume to your butt, helping clothes fit better and adding comfort during long flights or desk time. Our compression shirts aren’t just for shaping your torso — they support better posture and are a great option for post-surgical recovery too. Shapewear isn’t just about looks — it’s about feeling good all around.
