Duvets & Comforters
Bedding & Linens · 8 specs
Direct Answer
Duvet inserts and comforters are dimensioned larger than underlying mattresses to provide 12–16 inches of lateral side drape. Sizes span Twin/Twin XL (68×86"), Full/Queen (90×90" to 90×94"), and King/Cal King (106×92" to 108×94"), rated for warmth by Tog ratings (3.0 to 15.0 Tog).
Source: BS 5335 (Thermal Performance of Bedding) / Home Textile Guidelines · Last reviewed Aug 28, 2026
Specs
| Governing Standards | BS 5335 (Tog Thermal Rating) / Home Textile Sizing Standards |
| Twin / Twin XL Duvet | 68 × 86 inches (173 × 218 cm) to 68 × 90 inches |
| Full / Queen Duvet | 88 × 90 inches (224 × 229 cm) to 90 × 94 inches (229 × 239 cm) |
| King / Cal King Duvet | 106 × 92 inches (269 × 234 cm) to 108 × 94 inches (274 × 239 cm) |
| Oversized King Duvet | 120 × 98 inches (305 × 249 cm) | Deep pillowtop mattresses |
| Summer Warmth Rating | 3.0 to 4.5 Tog (Lightweight down/synthetic for warm rooms >21°C) |
| All-Season Warmth | 7.5 to 10.5 Tog (Medium warmth for room temps 18–21°C) |
| Winter Warmth Rating | 13.5 to 15.0 Tog (Heavyweight insulation for cold rooms <16°C) |
Duvet & Comforter Sizing Matrix
| Bed Mattress Size | Duvet Insert Dimensions (Inches) | Duvet Dimensions (cm) | Standard Lateral Overhang |
|---|---|---|---|
| Twin (38×75") | 68" × 86" | 173 × 218 cm | ~15 inches (38 cm) per side |
| Twin XL (38×80") | 68" × 90" | 173 × 229 cm | ~15 inches (38 cm) per side |
| Full (54×75") | 88" × 90" | 224 × 229 cm | ~17 inches (43 cm) per side |
| Queen (60×80") | 90" × 90" to 90" × 94" | 229 × 229 to 229 × 239 cm | ~15 inches (38 cm) per side |
| King (76×80") | 106" × 92" to 108" × 94" | 269 × 234 to 274 × 239 cm | ~15 inches (38 cm) per side |
| Cal King (72×84") | 106" × 94" | 269 × 239 cm | ~17 inches (43 cm) per side |