This is why you don't use Fireball to light Birthday Candles DnD Birthday Card This DnD birthday card is a witty reminder to stay clear of using Fireball to light birthday candles. With its playful design, this card is perfect for any DnD fan's birthday. Save the real Fireball for the game and keep the birthday cake intact. This 13.5cm square card is printed on 240gsm thick card and is blank inside for your personal message. Size 13.5cm square 240gsm thickness card Blank inside Each card includes a white envelope. SAFETY INFORMATION Type: Gift Card Holders Manufactured in the UK. Keep out of reach of children and fire. Materials: 240gsm card.