LEGO 1521 Basic Building Set Trial Size

Released 1989 · 24 pieces · Universal Building Set · Basic

LEGO Basic Building Set Trial Size (1521) was released in 1989 in the Universal Building Set · Basic line, with 24 pieces. It was one of 7 Universal Building Set sets released that year (see them all). Released in 1989, 37 years ago, well past the two-to-three-year run most LEGO sets get, so it is almost certainly out of production.

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• Estimated value: $18 (modelled from piece count, era, and age, not live market data)

Availability: Likely retired (inferred from its release year, not an official retirement date)

Full details, the price breakdown, and the minifigures included are below. Add it to your collection to track what it's worth.

• 73¢ per piece, pricier per piece than most Universal Building Set sets

More from 1989

Set data from the Rebrickable database, refreshed daily. Catalog data as of 2026-09-01. Values are this site's estimates, see how they're calculated.

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