Special Occasions

Big Sister & Big Brother Outfits

Celebrate their new titles with classic Cecil & Lou Big Sister and Big Brother outfits made for sibling announcements, family photos, hospital visits, gender reveals, and welcoming a new baby. Shop smocked Big Sister dresses, embroidered shirts, and coordinating Big Brother short sets in florals, bows, gingham, plaid, and timeless pink and blue styles.

Choose coordinating looks for brothers and sisters while giving each child an age-appropriate outfit of their own. These styles arrive pre-embroidered with “Big Sister” or “Big Brother,” and available colors, fabrics, sizes, and coordinating designs change with the collection.

  • Blue Dot Smocked Smocked Big Sister Dress Two baby girl's smocked dresses with ruffled sleeves, shown side by side on a white background. The left dress is light pink with pink 'BIG SISTER' text and a small green/blue floral border.

    Blue Dot Smocked Big Sister Dress

    $45.00
    $45.00 $45.00
  • Pink Dot Smocked Big Sister Dress Two baby girl's smocked dresses with ruffled sleeves, shown side by side on a white background. The left dress is light pink with pink 'BIG SISTER' text and a small green/blue floral border.

    Pink Dot Smocked Big Sister Dress

    $45.00
    $45.00 $45.00
  • Pink checkered blouse with 'Big Sister' text on a white background

    Pink Knit Gingham Embroidered Big Sister Shirt

    $29.00
    $29.00 $29.00
  • Blue Smocked Big Sister Dress

    Blue Smocked Big Sister Dress

    $45.00
    $45.00 $45.00
  • Pink Bow Smocked Big Sister Dress Young girl wearing a 'Big Sister' dress with a large white bow in her hair, standing in a grassy field.

    Pink Bow Smocked Big Sister Dress

    $45.00
    $45.00 $45.00
  • Floral Smocked Big Sister Dress Two young girls in matching light blue dresses with ruffled sleeves standing on grass.

    Floral Smocked Big Sister Dress

    $45.00
    $45.00 $45.00
  • Blue Bow Smocked Big Sister Dress Young girl in a 'Big Sister' dress pushing a baby stroller against a white background

    Blue Bow Smocked Big Sister Dress

    $45.00
    $45.00 $45.00
  • Blue Gingham Applique Big Brother Short Set Young boy wearing a light blue 'BIG BROTHER' shirt outdoors.

    Blue Gingham Applique Big Brother Short Set

    $43.00
    $43.00 $43.00
  • Blue Gingham Embroidered Big Brother Short Set Child wearing a light blue 'Big Brother' t-shirt on a white background

    Blue Gingham Embroidered Big Brother Short Set

    $43.00
    $43.00 $43.00
  • Blue Plaid Embroidered Big Brother Short Set Young boy wearing a 'Big Brother' outfit outdoors with greenery in the background

    Blue Plaid Embroidered Big Brother Short Set

    $43.00
    $43.00 $43.00
  • Blue Smocked Big Brother Short Set Smocked Threads Boy wearing a blue plaid outfit with big brother smocked across the chest.

    Blue Smocked Big Brother Short Set

    $45.00
    $45.00 $45.00

Frequently asked questions

Where can I find coordinated outfits for both big sister and big brother?
Right here. We offer matching sibling outfits that pair big sister smocked dresses with big brother short sets or embroidered shirts in the same fabric or colors for photos and special events.
Do you sell big brother little sister and big sister little brother matching looks?
Yes. Build big brother little sister outfits and big sister little brother outfits with coordinated dresses, bubbles, jon jons, tops, and shorts for picture-perfect family sets.
What sizes are available for these sibling collections?
Most styles are offered in 2T, 3T, 4T, 5, and 6. Use filters to view in stock sizes across both girls’ and boys’ options.
Are the big sister and big brother styles personalized or monogrammed?
These pieces are pre-embroidered with “Big Sister” and “Big Brother,” so monogramming or additional personalization is not available on these styles.
What should my kids wear for a sibling announcement or gender reveal?
Choose a classic big sister smocked dress and a coordinating big brother short set or embroidered shirt. Matching prints, gingham, or stripes keep the photos cohesive and timeless.
Do you have soft, everyday options as well as dressy outfits?
Yes. You’ll find cotton short sets, knit separates, and easy-care dresses for school and play, plus heirloom-inspired smocking and applique details for church and holidays.
How can I make sure the siblings truly match?
Filter by color or print and select items from the same fabric story. Pair a big sister dress with a big brother shirt or shorts in the matching pattern for a coordinated set.
What fabrics and details are used?
We focus on soft cottons with classic details—smocking, embroidery, clean piping, and appliques—in gingham, plaid, and stripe palettes suited for portraits and keepsake moments.