Boulders by scale
Choose the Boulder Starting Grade
Boulder size overlaps the larger rock grades. Start at the minimum ending shown for your scale, then go bigger when the scene needs more visual weight.
Boulder Scale Guide
Every ending at or above the number shown can be used as a boulder for that scale.
| Rock size | N scale | HO scale | O scale | G scale |
|---|---|---|---|---|
| Boulders | 4 and bigger | 5 and bigger | 6 and bigger | 7 and bigger |
N scale starts with 4+, HO with 5+, O with 6+, and G with 7+. The same physical stone appears larger in a smaller modeling scale.
Shop boulders and extra-large rocks
Use clustered pieces at cliff bases, tunnel portals, canyon floors, stream banks, and prominent outcrops.
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