Frequently Asked Questions
Answers to the questions BJD beginners ask most often.
BJD basics
Q. What does BJD stand for?
Ball-Jointed Doll. The term refers to dolls whose parts are linked at spherical joints and held together by internal elastic cord (tension cord), allowing a wide range of posing. In Korean, it is called 구체관절인형 (gucheo-gwanjeol-inhyeong).
Q. Is every posable doll a BJD?
No. To be classified as a BJD, the doll must have a joint ball inserted at each parts junction and be held together by the tension of internal elastic cord. Mass-produced inexpensive posable dolls that use internal plastic frames or plastic joints are not BJDs — the Korean BJD community calls those 'jointed dolls' (관절인형) to distinguish them. A product listed as 'BJD' on a general marketplace is not a BJD if its internal structure differs.
Q. Why are BJDs expensive?
Most BJDs are cast from polyurethane resin in silicone molds, in small batches, almost entirely by hand. Master sculpting, mold-making, casting, sanding, and stringing are all manual steps, and polyurethane resin itself is costly. Unlike inexpensive posable dolls that are injection-molded at high volume, BJDs cannot be produced at scale. Price varies significantly by size, limited-edition status, and whether the doll is sold as a full set.
Q. What price range should I expect?
Pocket-size (around 10–19cm) dolls run roughly $70–200; MSDs (about 40cm) $200–400; SDs (57–65cm) $330–1,000. Limited editions and full sets are higher. In the early years of the market, Japanese auction imports easily exceeded $3,300 after customs; prices have come down since more Korean and Chinese makers entered the market and the second-hand scene matured. (Prices are approximate, converted from Korean won at a fixed reference rate of 1 USD = ₩1,500.)
Q. Where do I buy a BJD?
Either directly from a maker's official site, or through a dealer shop that carries multiple brands. Overseas brands can be purchased via direct international shopping or through a proxy buyer. BJDs are not sold in regular toy stores.
Q. Will I get my order right away?
Most BJDs are MTO (Made To Order). Production typically takes 2–3 months after ordering. One reason is that polyurethane resin begins to yellow as soon as it is exposed to air, which discourages producing large batches in advance. Limited-sale windows and in-stock items can ship immediately.
Q. What size do you recommend for beginners?
Choose among the mainstream classes: USD (about 26cm), MSD (about 42cm), or SD (about 60cm). Dolls above SD can be heavy and bulky, and clothing or props are harder to find. For a beginner, MSD tends to offer the best balance of price, upkeep, and market availability.
Q. What is the recommended age for BJD ownership?
Most makers recommend ages 15 and up. Polyurethane resin is mildly toxic; upkeep involves organic solvents such as thinner; fine resin dust from joint wear should not be inhaled; and upkeep costs are ongoing.
Upkeep & customization
Q. What is a faceup?
Applying makeup to a doll's face using pastel, acrylic paint, colored pencils, and similar tools. Eyebrows, lips, blushing, and lashes are painted on and sealed with a matte spray such as Mr. Super Clear (MSC).
Q. Can I do faceups myself?
Yes. You need pastel, acrylic paint, fine brushes, and MSC spray at minimum. Beginners should practice on a practice head first. Professional faceup artists will also take commissions; typical prices run $30–130.
Q. How do I change the eyes?
Open the head cap (the back of the skull) and swap the eyes out from inside. Eye size is given in millimeters; the correct size depends on the head mold. Eyes are made from glass, acrylic, urethane, or silicone.
Q. How do I slow down resin yellowing?
Polyurethane resin yellows gradually from the moment it contacts air, and ultraviolet light accelerates the process. Keep the doll out of direct sunlight and store it in a dark place — the original shipping box works. UV-blocking display cases help if you want to keep the doll on show. No method stops yellowing entirely; you can only slow it.
Q. My doll's joints have gone loose. What do I do?
The internal elastic cord has lost tension. Re-string it. As a quick fix, you can apply hot glue inside the joint cup to increase friction (the 'hot-glue suction' trick), or insert thin silicone joint-fix pieces between parts to add friction.
Q. What's the difference between single and double joints?
Single-joint elbows and knees bend at one hinge; double-joint versions have two joint balls stacked vertically, allowing the limb to bend twice. Double joints enable kneeling, sitting on heels, and similar poses. Makers often re-release an originally single-joint body as a double-joint revision. Check the joint structure before buying if posing matters to you.
Q. Can I combine a head and body from different brands?
Yes — this is called a hybrid. The neck hole and skin color need to match, so measure and compare before committing. If the neck hole is too wide, a joint-fix piece can fill the gap.
Q. Is it safe to put dark-colored clothes or wigs on my doll?
Dark fabric and wig caps can transfer dye to the resin if left in contact too long. Early-stage staining can be wiped off with a melamine sponge dampened with water, but once it soaks into the resin it is permanent. A silicone head cap under the wig prevents dye transfer from wig caps.
Buying & selling
Q. What is a recast?
An unauthorized copy made by casting from a pirated mold of an original doll. Recasts look similar but fall short on material quality, detail, and durability, and they violate the original artist's intellectual property. The BJD community has a very strong negative stance toward recasts; many spaces restrict participation by recast owners.
Q. How do I tell an original from a recast?
Buying from an official site or authorized dealer is the safest path. For second-hand purchases, check the Certificate of Authenticity (COA), the original box, and the purchase receipt. Unusually low prices and unclear sources are warning signs.
Q. What should I watch for when buying a second-hand BJD?
Check the degree of yellowing, the parts included (full set vs. basic), any damage (cracks, scratches), and authenticity. Request real-world photos before committing, and confirm whether a COA or purchase receipt is available.