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Sherburne Wood Post Caps by Nantucket Post Cap

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The final product price may change based on the combination of size / type / finish / style you choose.

Sherburne Flat Top Post Cap.  Made from 100% kiln dried premium Western Red Cedar or Redwood.  Measurement of flat top is equal to the actual post size.  For example if a 6" x 6" cap is ordered, the flat portion on top measures 6" square.

Both Red Cedar and Redwood have natural resistance to moisture, decay and insects.

Available for wood post sizes of 4x4, 5x5, 6x6, 7x7, 8x8, 9x9, and 10x10.

Molding depth: 1-1/8"

All Nantucket Flat Post Caps can be used in conjunction with a finial top (sold separately).

Sherburne Post Cap:

  • Fits standard wood posts from 3-1/2" x 3-1/2" up to 10" x 10"
  • Perfect base for a finial decorative top
  • Comes in Western Red Cedar and Redwood
  • Also available in custom specialty sizes - please call or email for pricing

Some post cap sizes are special order items.  Please see shipping information below.

How to choose the correct post cap size:

Nantucket Post Cap LogoNantucket Post Caps are sized according to the actual physical measurement of your post.  All post caps are made 1/8" larger on the opening then the actual post size you specify.  For example, if your 4x4 standard post truly measures 3-1/2" x 3-1/2", then you would choose that size and your cap would come with an inside measurement of 3-5/8" x 3-5/8". 

All Nantucket Post Cap products are made in the U.S.A.


Post caps for 3-1/2" - 6" posts usually ship within 2-3 business days.  Larger sizes are special order and usually ship within 5-7 business days.

Please see our return policy for additional details.