Learn which dimensions to check before combining heads and bodies from different BJD makers.
The neck connection comes first
Compatibility depends on neck circumference, opening shape, attachment system and internal clearance. A head with a matching nominal scale may still sit too high, too low or at an unnatural angle. Never force a head onto an incompatible joint or connector.
Compare the visual proportions
Shoulder width, torso scale, hand size and overall height affect whether a hybrid doll looks balanced. Compare straight-on and three-quarter photographs, not only a posed promotional image. A tiny difference in head size can be noticeable when the body proportions are very stylized.
Check resin matching carefully
Manufacturers use different resin mixes and color labels. Even the same company may have batch variation over time. If you cannot see an in-person match, request neutral daylight comparison photographs and be comfortable with a potential mismatch before committing.
Consider weight and posing
A heavier head can change balance and put extra load on a neck joint. Check whether the body will safely hold the hybrid configuration. A professional doll technician may be the right person to advise if modifications are required.
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