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Discover your perfect fit with us! Whether you're going to the gym, on a run, or lounging around - we've got you covered. Our sizing ranges from XS - XXL with a wide selection of styles to accommodate diverse body shapes. Our guides take into account both body measurements and specific style fit to ensure comfort and performance.
| Waist (cm) | Hips (cm) | |
| XS | 65-70 | 90-95 |
| S | 70-75 | 95-100 |
| M | 75-80 | 100-105 |
| L | 80-85 | 105-110 |
| XL | 85-90 | 110-115 |
| XXL | 90-95 | 115-120 |
| Bust (cm) | Underbust (cm) | Waist (cm) | |
| XS | 80-85 | 70-75 | 65-70 |
| S | 85-90 | 75-80 | 70-75 |
| M | 90-95 | 80-85 | 75-80 |
| L | 95-100 | 85-90 | 80-85 |
| XL | 100-105 | 90-95 | 85-90 |
| XXL | 105-110 | 95-100 | 90-95 |
|
MSCR SIZE |
AU |
US |
UK |
EU |
|
XS |
6-8 |
2-4 |
6-8 |
34-36 |
|
S |
8-10 |
4-6 |
8-10 |
36-38 |
|
M |
10-12 |
6-8 |
10-12 |
38-40 |
|
L |
12-14 |
8-10 |
12-14 |
40-42 |
|
XL |
14-16 |
10-12 |
14-16 |
42-44 |
|
XXL |
16-18 |
12-14 |
16-18 |
44-46 |
*For the most accurate fit we recommend referring to our measurement guidelines above.
TOPS
| Chest (cm) | Waist (cm) | |
| S | 97-102 | 75-80 (30 Inch) |
| M | 102-107 | 80-95 (32 Inch) |
| L | 107-112 | 85-90 (34 Inch) |
| XL | 112-117 | 90-95 (36 Inch) |
| XXL | 117-122 | 95-100 (38 Inch) |
| XXXL | 122-127 | 100-105 (40 Inch) |
BOTTOMS
| Waist (cm) | Hips (cm) | |
| S | 75-80 (30 Inch) | 90-95 |
| M | 80-95 (32 Inch) | 95-100 |
| L | 85-90 (34 Inch) | 100-105 |
| XL | 90-95 (36 Inch) | 105-110 |
| XXL | 95-100 (38 Inch) | 110-115 |
| XXXL | 100-105 (40 Inch) | 115-120 |
Men’s best selling activewear is made up of pieces that get worn often because they work across real training weeks. Fit stays consistent, fabrics feel comfortable under effort, and construction holds up to repeat washing. These are the types of styles you’ll find throughout Men’s Activewear, built with movement in mind.
Best sellers also tend to include reliable upper body options, especially staples from Men’s Tops and Shirts that suit warm ups, strength days, and everyday wear without needing overthinking.
Across best sellers, shorts typically show up because they handle different session types without compromise. Training focused fits from Men’s Gym Shorts cover everyday workouts where comfort and range of motion matter most. For higher intensity days, technical builds from Men’s Performance Shorts are common picks, especially when lighter weight feel, airflow, and stretch make a difference. Together, these categories reflect demand driven by function, not seasonal hype.
Muscle Republic's best sellers exist for a reason. These are the fits athletes come back to repeatedly, tried across heavy sessions, cardio work, and daily training. They set the benchmark for structure, drape, and mobility that holds up over time.
Browsing Men's New Arrivals alongside best sellers makes it easy to weigh what's changed in fabric, feel, and fit against what's already proven. Shop the full range and build your rotation around what actually performs.