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 |
SWEET DAYS Lift Trunk 5-Pack
Description
Description
Sad and bitter days are over... Now your whole week has become sweeter and more fun!! 😃 🍭 🍌 🍉
#MotivationMonday #TacoTuesday #HappyHumpDay #ThrowbackThursday #FridayFunday
Wearable tech has never felt so good! Is your bum not as plump or perky as it used to be? Then this is the perfect underwear for you! Our hidden bands design creates a push-up effect that redefines your cheeks.
FEATURES
- [LIFT Tech]®
- Daily packs
- Includes 5 trunks
- Push up effect
- No padding needed
- Undetectable to the eye
Fabric
Fabric
Care Instructions
Care Instructions
*Exclusive patented design: USD864,521S
- Reviews
- Questions
CanadaFantastic fit!
Service was fantastic! - Quick delivery - great quality - fun product Will definitely order again!
Rounderbum Canada
Looking forward to hear from you again soon ;) Regards
CanadaSmiles and Motivation
The fit is comfortable, they lift my saggy 67 year old *** and the colours and titles for days of the week are joyful and motivating. Especially “Motivation Monday”! Love my undies!
Rounderbum Canada
Thank you Jean! Hope you enjoy and love the products as muuch as we do :D
United States United StatesAmazing post-purchase support… and the trunks are pretty great too.
First off, let me say that these trunks are great; my wife loves them and gives them the seal of approval, as they look and feel amazing and she loves the color palette. I am very pleased with the fit and comfort as well. The one and only complaint I’ve had with CK trunks in the past was the front waist band rolling down on some pairs while wearing them (I’m a slim/athletic build with no belly), typically because of sitting down, etc.. With the low-rise front (truly low-rise), I can’t see this being a concern with these trunks. However, what turned from likely never buying again after my purchase / product receipt to definitely purchasing from them again and recommending the brand to friends was the post-purchase customer service. I was very pleased and satisfied with the solution the Rep provided me and they were fantastic overall. I am very appreciative and thankful for their help and assistance. If it helps, I’m 5’11 currently 174 lbs. with body fat in the 10-12% range, size 30-31” waist and I am wearing the Mediums. I’d post a picture for reference, but I’m not sure how on this email review submission.
United StatesFestive underwear
Love the fit and feel. Would recommend them to friends…
Rounderbum Canada
We’re thrilled to hear you enjoyed your experience, thank you Chris! :)
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.