Olympic Bumper Plate Colors & Dimensions
Weightlifting & Strength Standards · 8 specs
Direct Answer
Competition bumper plates are globally standardized by the International Weightlifting Federation (IWF) into an exact 450 mm (17.72 in) outer diameter and universal color-coded weight designations: Red (25 kg / 55 lb), Blue (20 kg / 45 lb), Yellow (15 kg / 33 lb), and Green (10 kg / 22 lb).
Source: IWF Technical and Competition Rules & Regulations / Section 3.3.3 Plates · Last reviewed Aug 28, 2026
Specs
| Governing Standards | IWF (International Weightlifting Federation) / IPF / USAW Rules |
| Standard Outer Diameter | 450.0 mm ± 1.0 mm (17.72 in) across all competition bumper plate weights |
| Center Collar Bore Diameter | 50.4 mm to 50.8 mm (precision fit for 50 mm Olympic barbell sleeves) |
| Red Plate (IWF 25 kg / US 55 lb) | Thickness: ~60–65 mm | Solid Red | Heaviest standard bumper plate |
| Blue Plate (IWF 20 kg / US 45 lb) | Thickness: ~50–55 mm | Solid Blue | Universal benchmark weight |
| Yellow Plate (IWF 15 kg / US 35 lb) | Thickness: ~40–45 mm | Solid Yellow |
| Green Plate (IWF 10 kg / US 25 lb) | Thickness: ~30–35 mm | Solid Green | Minimum diameter plate safe to drop alone |
| Change Plate Colors | 5 kg (White), 2.5 kg (Red), 2.0 kg (Blue), 1.5 kg (Yellow), 1.0 kg (Green), 0.5 kg (White) |
IWF Standard Competition Bumper Plate & Change Plate Color Matrix
| Plate Weight (kg) | US Equivalent (lbs) | Standard Color | Outer Diameter (mm) | Approximate Thickness (mm) | Plate Category |
|---|---|---|---|---|---|
| 25.0 kg | 55 lbs | Red | 450 mm (17.72") | 60–65 mm | Full Bumper Plate |
| 20.0 kg | 45 lbs | Blue | 450 mm (17.72") | 50–55 mm | Full Bumper Plate |
| 15.0 kg | 35 lbs | Yellow | 450 mm (17.72") | 40–45 mm | Full Bumper Plate |
| 10.0 kg | 25 lbs | Green | 450 mm (17.72") | 30–35 mm | Full Bumper Plate |
| 5.0 kg | 11 lbs | White | 230 mm (Fractional) | 20 mm | Small Change Plate |
| 2.5 kg | 5.5 lbs | Red | 190 mm (Fractional) | 16 mm | Small Change Plate |
| 2.0 kg | 4.4 lbs | Blue | 175 mm (Fractional) | 14 mm | Small Change Plate |
| 1.5 kg | 3.3 lbs | Yellow | 160 mm (Fractional) | 12 mm | Small Change Plate |
| 1.0 kg | 2.2 lbs | Green | 140 mm (Fractional) | 10 mm | Small Change Plate |
| 0.5 kg | 1.1 lbs | White | 120 mm (Fractional) | 8 mm | Small Change Plate |
Durometer Shore A Hardness and Drop Rebound
- High-Density Virgin Rubber (88–92 Shore A): Competition bumper plates feature high rubber hardness to minimize bounce when dropped overhead, protecting platform floorboards and preventing the barbell from rebounding into the athlete.
- Crumb / Hi-Temp Rubber (75–80 Shore A): Outdoor and CrossFit training plates use softer vulcanized crumb rubber that provides higher bounce and outdoor durability on asphalt.