Sarcastic birthday card for brother reading “Congratulations on being a year older and still maintaining low maturity.”
Low Maturity Birthday Card for Brother styled on a wooden desk with a coffee cup and pen.
Low Maturity Birthday Card for Brother displayed on a marble surface beside a crystal vase.
Close-up of the Low Maturity Birthday Card for Brother showing the black and gold party-hat design.
Product spec card: printed on luxurious linen cardstock, comes with a matching envelope and protective cello sleeve
Product spec card: folded 5x7 (A7) art greeting card, blank inside, richly printed with crisp detail
Designs by Linda Nee brand card: proudly designed and made in the USA
Shop more fine art prints and gifts at designsbylindanee.com — photo paper, metal, and more
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Sarcastic birthday card for brother reading “Congratulations on being a year older and still maintaining low maturity.”Low Maturity Birthday Card for Brother styled on a wooden desk with a coffee cup and pen.Low Maturity Birthday Card for Brother displayed on a marble surface beside a crystal vase.Close-up of the Low Maturity Birthday Card for Brother showing the black and gold party-hat design.Product spec card: printed on luxurious linen cardstock, comes with a matching envelope and protective cello sleeveProduct spec card: folded 5x7 (A7) art greeting card, blank inside, richly printed with crisp detailDesigns by Linda Nee brand card: proudly designed and made in the USAShop more fine art prints and gifts at designsbylindanee.com — photo paper, metal, and more

Low Maturity Birthday Card for Brother

Another Year, Same Low Bar

Price:
$5.00
Bundle Set: 1 Card
  • Free U.S. shipping over $50
  • Ships in 1–3 business days
  • Easy 30-day returns
  • Tracking included on every order
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Pickup available at 25 Maple Street

Usually ready in 2-4 days

Description

"Congratulations on being a year older and still maintaining such a low level of maturity. You are truly an inspiration." This sarcastic birthday card calls out your brother's refusal to grow up — and celebrates it.

Bold vintage-style typography sits over a simple party hat illustration, framed in an understated black-and-gold design, printed on quality linen cardstock. It's the perfect birthday card for brother when a sweet, sentimental option just won't land — a 5 × 7-inch folded card, blank inside, with a coordinating envelope included.

Product Details

• Crisp black typography with muted gold accents
• Lightly distressed vintage-inspired design

Size & Format

• 5 × 7 inches, folded card
• Coordinating envelope included

Packaging & Shipping

• Packaged flat to arrive in pristine condition
• Ships within 1–2 business days

Perfect For

• Brothers celebrating a birthday
• Sarcastic sibling humor
• Milestone birthdays (40th, 50th, 60th)
• Anyone refusing to grow up
• Just-because teasing

Complete Your Collection

Need more sarcastic sibling humor? Pair it with the Selfish Birthday Card for Best Friend or the Old Age Joke Funny Birthday Card for Men, or browse more sarcastic birthday cards from Designs by Linda Nee for every immature adult in your life.

FAQ

Is this card blank inside?
Yes, it's blank inside so you can write your own message.

What size is the card?
5 × 7 inches, with a coordinating envelope included.

Is this a good birthday card for brother?
Yes — it's designed specifically for sarcastic, low-maturity birthday humor between siblings.

© Designs by Linda Nee LLC

Frequently Asked Questions

Our greeting cards are printed on premium, textured Red River Linen card stock for a boutique-stationery feel.
Each card is a folded 5 x 7-inch card in standard portrait orientation.
Yes, our greeting cards are blank inside so you can add your own personal message.
Yes, every card ships with a coordinating envelope included.
Yes, most designs are available as 1 Card, 5 Cards, or 10 Cards, so you can stock up on your favorites.
Our greeting card designs cover everything from birthdays and holidays to thank-you notes, sympathy, and just-because moments — browse by collection to find the right design for your occasion.
Yes, feel free to add multiple different designs to your cart in a single order — each design ships together unless noted otherwise.

Handcrafted in NH

Premium quality designed and produced in our New Hampshire studio

Secure Packaging Guaranteed

Every item is hand-inspected and securely packed to prevent damage during transit

100% Satisfaction Guarantee

Dedicated support to ensure you love your purchase

Made to Order, Just for You

Every piece is custom-imprinted after you order — never mass-produced off a shelf

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