noun which may take the genitive case particle 'no'
queen size; large size
Used primarily for bedding and occasionally for other products to indicate a size larger than standard but smaller than king size.
クイーンサイズのベッドを買いました。
I bought a queen-size bed.
このホテルの部屋にはクイーンサイズのベッドがあります。
This hotel room has a queen-size bed.