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.BOXER BRIEFS / BOXERS / TRUNKS / BRIEFS / JOCKS
Our underwear fits true to size and are fitted, however if you like your underwear 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 |
T-SHIRTS / TANK TOPS / VESTS
| 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 |
SHORTS / JOGGERS & PANTS
| 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 |
BRIEFS / SHORTS
| 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 |
Slim Fit Boxer Brief
Description
Description
Rounderbum introduces the most innovative technology in men's shapewear. Our compression construction provides comfortable support, slims waist and improves body definition.
Increase overall confidence. Tightens midsection and enhances muscle appearance right before your eyes.
Our little secret. Undetectable and invisible to the eye under all clothing.
Superior comfort and design in men's shapewear.
FEATURES
- [COMPRESSION Tech]®
- Fly opening
- Slimming midsection waistband
- Provides compression and firmness to abs and lower back
Fabric
Fabric
Care Instructions
Care Instructions
- Reviews
- Questions
CanadaNot worth it.
Size guide steered me wrong. It’s so loose that it doesn’t do any sliming.
Rounderbum USA
Thank you for your comments Andrew, we will take a look in to this to find a solution for you.
United StatesGreat fit an support
I have an umbilical hernia and this gives the abdominal support I need in a comfortable garment.
Rounderbum USA
Dear Richard we are so glad to know this product helped you, thank you very much for sharing this experience with us!
United StatesGreat underwear after abdominal surgery
Dr recommended a waist belt. I knew just what web site to go to. I have to wear it for six months so these are perfect. Thank you.
Rounderbum USA
Dear Richard We are very happy to know we were able to help you, thank so much for your trust!
CanadaComfortable fit but.....
The slim fit boxer brief is comfortable, and the support part is as well. I mistakenly thought there was a padded component to these just because of the name of the company being "rounderbum". Maybe an asterisks on them indicating if you want the padded version look for them on the webiste. After receiving them, I went back to see the padded versions elsewhere on the site.
United StatesThese are the best!! They hold in my stomach really well without rolling down. Actually felt as if I had nothing on under my pants!!
FAQ about shapewear
Do men use shapewear?
Do men use shapewear?
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?
Is it good to use shapewear?
Is it good to use shapewear?
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.
What does shapewear do?
What does shapewear do?
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.