Here is the box I build when I sell dolls. It's 4 small boxes taped together, and fits a full size doll box with padding. Comes out to 23x12x8 and you use

A Michigan couple's mailbox has been taken over by small dolls - The Washington Post

How To Make A Doll Room Out Of A Box--Part Two — Pixie Dust Dolls

MY BIG SISTER KELSEY & JODI FASHION DOLLS New In Box 1998 Kid Kore 18205

Doll Bed From Cardboard : 7 Steps (with Pictures) - Instructables

Cute new Dowdle mini wooden puzzles! Multiple versions, 4-pack, $29.99, #1582453. Comes with a tray. Reg Dowdle box and piece for scale. : r/Costco

Collecting Warehouse Redoll Clear Folding Display Box with White Liners and White Elastic for 11-12 inch Dolls or Action Figures, 4 W x 2.25 D x 13 H, Pack of 6

DIY Boxes NO Pattern Needed Large or Tiny Boxes / Dollhouse Boxes / Large Gift Boxes

DIY ROOMBOX, Movable WALLS + Working DOOR & WINDOW!

My puzzle came with a wood separator for different colors that fits in the box. : r/mildlyinteresting

Doll in a Box - My Gift to my 5yrd Old - Red Ted Art - Kids Crafts

Easy to Build Toy or Doll Cardboard House : 5 Steps - Instructables

DIY Boxes NO Pattern Needed Large or Tiny Boxes / Dollhouse Boxes / Large Gift Boxes

Cute new Dowdle mini wooden puzzles! Multiple versions, 4-pack, $29.99, #1582453. Comes with a tray. Reg Dowdle box and piece for scale. : r/Costco

Priority Mail® Forever Prepaid Small Box – PPSFRB

Small Boxes with Handles w/ Candy – Stanton Sweets

20x Tiny Shipping Boxes, Small Parcel Flat Shipping Boxes, Mailers for Small Business, Packaging Boxes Wholesale - Canada

Miniature Boxes - Small

Small Gift Boxes 100 Pack, Kraft Gift Boxes Bulk 2.16'' × 2.16'' × 0.98'', Small Cardboard Boxes for Jewelry Packaging, White