When writing a wedding shower card, its important to keep your message sincere, sweet, supportive, and celebratory. Here are some tips and ideas from various sources:

• Keep your message short and sweet, two or three lines would be sufficient.
• Address the card to the bride-to-be, unless its a couples shower, in which case you can mention the persons future spouse in the card.
• Wish the bride well on her wedding day and a happy future with her spouse. Let her know how much she means to you and how happy you are for her. Share your excitement for her upcoming nuptials.
• You can also share a little tidbit of advice if it feels right.
• Include personal touches and compliments to the bride-to-be.
• Dont try too hard to be funny.
• Sign off with a warm closing, such as "All my love," "Congratulations!," "Cheers!," "Warmly," or "XOXO".
• If youre delivering the card in person, simply write the name(s) of the shower honoree(s) on the outside of the envelope. If youre sending your correspondence by mail, address the envelope to the bride-to-be.

Examples of what to write in a wedding shower card:

• "So happy to shower you with love today!"
• "Happy shower day—Im so happy to celebrate your happily ever after."
• "You’re going to make such a beautiful bride."
• "You deserve a lifetime of happiness and I know that’s exactly what you’re going to get with your soulmate."
• "Wishing you all the best for an amazing bridal shower, wedding day, and life spent with your loved one."