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 |
O-Line Package Trunk
Exclusive [PACKAGE TECH]® that will naturally enhance the appearance of your manhood! It integrates our smart package pouch that ensures a natural look so that you can feel confident and well endowed. The material is so soft that gives a subtle look while adding more volume to the area.
Overall rating: 4.7 / 5 from 23 reviews.
Muy cómodo, talla perfecta y muy buena calidad
Store owner replied: Hola, Agradecemos enormemente sus amables palabras sobre nuestro O-Line Package Trunk. Nos alegra mucho saber que encontró el producto muy cómodo, de talla perfecta y de muy buena calidad. Gracias nuevamente por su reseña.
Previous I purchased the brief that you can manually insert the cup. That was a much better product and fit better. The overall design was better
Store owner replied: Hey, Thank you for taking the time to share your honest feedback regarding your recent purchase of the O-Line Package Trunk. We understand you found our previous brief with the manual cup insert to be a better fit and overall design for your preferences. Please feel free to reach out to our customer support team directly if you would like to discuss your experience further or need assistance exploring other options
perfect.
Store owner replied: Thanks so much for taking the time to leave us a 5-star rating – it’s much appreciated!
The O line trunks are fantastic! I’m above avg a bit but that little bit of padding makes me feel sexy!! Love em
I like that the padding is not overdone, it gives just that little bit of extra. They are very comfortable to wear, the fabric feels great. If the legs would have been longer they would have been perfect. Please make a boxer brief version of these. While I wait for you to grant my wish I will be buying more of these. Shipping is very fast, like five days including weekend to the other side of the world.
Store owner replied: Dear Kim! Thank you so much for sharing this amazing experience with us, we are glad you had a good time! :D Your suggestion will be shared with the correct department :D
Great product I already have a large bum but the rounderbum makes the bum more prominent even my partner loves them.
Store owner replied: We are feeling very happy to know we met all your expectations! :D
enhances my best really good
Store owner replied: Thanks for sharing your experience Andre!
fit great look and material feel great a d package never looked better had pare with removable pad love these more
Store owner replied: Dear James, It's great to hear that you had a 5-star experience purchase with us.
I really do like the comfort an enhancement of this truck. The fifth star could happen if you expanded your offerings to include more colors and fits. There were a lot of out of stocks, especially on larger sizes. Perhaps this might indicate that a majority of your audience is in the large and above categories? So perhaps more of these sizes and even an XXL would be nice.
Store owner replied: Dear Mark Thank you for pointing this out, our team will be happy to explore and evaluate this aspect.
Please keep good quality
Store owner replied: Thanks Jaret! We are happy to know you are feeling good with your undies!
Good fit but was expecting a little more padding. An enclosed pouch would hold everything in place and add to a better look & comfort
Gives a decent shape in the front but only works well when you are not wearing pants or jeans that are extremely tight as it defeats the purpose of the technology.
Can’t say enough great things, best underwear purchase ever!
Not enough padding to make any difference at all.
Store owner replied: Hi Mark! We invite you to contact us at customerservice@rounderbum.com so we may discuss and resolve your specific personal experience at Rounderbum. Looking forward to hearing from you! Thank you
I’m happy with the purchase, though they are a little pricey. I was expecting a little more bulk, and the trunks to be a little longer, but all and all, glad to see what all the fuss is about.
Store owner replied: Hi Jim, Thanks for letting us know about your experience, we are glad to see you are happy with your purchase.
They are REALLY COMFORTABLE.
I was slightly hesitant on getting these, the idea was a little taboo for me. But I’m so glad I did! They fit perfectly and and the most comfortable underwear I have ever worn. I have already bought a few more pairs of these!
Store owner replied: Thanks for your amazing review Scotty, we are so pleased to know you had a great experience :)
Very comfortable and sexy
Store owner replied: So glad to know the product was under your expectations :)
I love everything aboutYour underwear they’ve been excellent!
Love them
Store owner replied: So glad to know you love them :D
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.
