Blanket Size vs. Mattress Size
The first and most important step is to understand that a blanket's sizing is not identical to mattress sizing. While they're often named similarly (e.g., King, Queen), blankets are typically a few centimeters larger to allow for drape over the sides of the bed.
Twin: A standard Twin blanket (around 168 x 228 cm) is perfect for a Twin bed (96 x 190 cm) and is a great size for kids or single sleepers.
Full/Queen: This dual sizing (around 228 x 228 cm) is versatile. It fits a Full bed (137 x 190 cm) perfectly, with plenty of overhang. On a Queen bed (152 x 203 cm), it provides a standard fit, covering the top and sides.
King/California King: A King blanket (around 274 x 228 cm) is made for a King bed (193 x 203 cm). It's also an excellent choice for a Queen bed if you want a more luxurious, oversized look or if you share the bed and need more coverage.
Consider Your Sleeping Style
For a shared bed: If you're sharing a bed, a King-sized blanket is often the best choice for a Queen bed. This prevents nighttime blanket tug-of-war and ensures both sleepers have enough coverage.
For restless sleepers: If you toss and turn, a larger blanket size can help you stay covered all night long.
For solo sleepers: A blanket that matches your bed size is usually sufficient, as long as you don't mind the standard overhang.
Think About the Blanket's Purpose
Bedding: A blanket used for the bed should be chosen based on the mattress size and your personal preference for drape and coverage.
Decorative Throw: For a sofa or armchair, a throw blanket (typically 127 x 152 cm) is the perfect size. It's meant to be functional but also a stylish accent piece.
Couch Blanket: If you like to be completely cocooned on the sofa, a Queen-sized blanket might be a better choice than a standard throw.
Factor in Mattress Height
A modern pillow-top or extra-deep mattress
can make a standard blanket seem too small. If your mattress is thicker than 30 cm, you may need to size up to ensure the blanket provides adequate coverage and drapes nicely over the sides.