Thank you for your attention � � Let's first clarify what you're aiming for: Do you want a fuller, plumper look for your 50x50 inner cushion, or a more relaxed, lightweight appearance? Our product has a fabric that is already strong and maintains its shape. Generally: - **50x50 inner cushion + 50x50 cover**: Provides a more balanced, standard posture. - **50x50 inner cushion + 45x45 cover**: The cushion can stand up fuller and straighter as it will be lightly compressed. The **40x40 cover** might be quite small for this pillow, there is a risk of it being too tight. If you prefer a fuller look, we recommend the 45x45 option. For a more standard fullness, consider the 50x50 option. Please review the size chart on our page to make the best choice for you. � � � �️