The entire wood industry uses what is known as nominal sizes. For anyone not in the lumber and construction industry, this can be confusing. Nominal sizes are simplified ways to reference not actual sizes. Simply instead of having to say “let me get three-quarters by three and one-half inches” you can simply say “one by four”. This is an industry-standard sizing. It also addresses the shrinkage and expansion of the boards that is caused by less or more humidity. Actual sizes can vary depending on where the wood is stored and installed due to the expansion and contraction of natural wood.
There were some lawsuits against Home Depot and Menards in 2017 that resulted in the Nominal size use being upheld as an industry standard. As a consumer, it is important to understand the difference.
We have considered not using Nominal Dimensions, however, we decided it would be more confusing for professionals than it would be helpful for novice consumers. So we list every item in the actual size and the nominal size. If not otherwise indicated all sizes are nominal.
Understanding Nominal vs Net Sizes
|Ipe Nominal Dimension Sizes||Ipe Net Sizes (Actual Size**) – Decimal||Ipe Net Sizes (Actual Size**) – Fraction||Spoken|
|1 x 4 Ipe||.75″ x 3.5″ Ipe||3/4″x3-1/2″||Three-Quarter Inch by Three and a Half Inches|
|1 x 6 Ipe||.75″ x 5.5″ Ipe||3/4″x5-1/2″||Three-Quarter Inch by Five and One-Half Inches|
|1 x 8 Ipe||.75″ x 7.25″ Ipe||3/4″x7-1/4″||Three-Quarter Inch by Seven and a Quarter Inches|
|1 x 10 Ipe||.75″ x 9.25″ Ipe||3/4″x9-1/4″||Three-Quarter Inch by Nine and One Quarter Inches|
|1 x 12 Ipe||.75 x 11.25″ Ipe||3/4″x11-1/4″||Three-Quarter Inch by Eleven and One Quarter Inches|
|5/4 x 4 Ipe||1″ x 3.5″ Ipe||1″x3-1/2″||One Inch by Three and One-Half Inches|
|5/4 x 6 Ipe||1″ x 5.5″ Ipe||1″x5-1/2″||One Inch by Five and One-Half Inches|
|5/4 x 8 Ipe||1″ x 7.25″” Ipe||1″x7-1/4″||One Inch by Seven and One-Quarter Inches|
|5/4 x 10 Ipe||1″ x 9.25″ Ipe||1″x9-1/4″||One Inch by Nine and One-Quarter Inches|
|5/4 x 12 Ipe||1″ x 11.25″ Ipe||1″x11-1/4″||One Inch by Eleven and One-Quarter Inches|
|2 x 2 Ipe||1.5″ x 1.5″ Ipe||1-1/2″x1-1/2″||One and One-half Inches by One and One-half Inches|
|2 x 4 Ipe||1.5″ x 3.5″ Ipe||1-1/2″x3-1/2″||One and One-half Inches by Three and One-Half Inches|
|2 x 6 Ipe||1.5″ x 5.5″ Ipe||1-1/2″x5-1/2″||One and One-half Inches by Five and One-Half Inches|
|2 x 8 Ipe||1.5″ x 7.25″ Ipe||1-1/2″x7-1/4″||One and One-half Inches by Seven and One-Quarter Inches|
|2 x 10 Ipe||1.5″ x 9.25″ Ipe||1-1/2″x9-1/4″||One and One-half Inches by Nine and One-Quarter Inches|
|2 x 12 Ipe||1.5″ x 11.25 Ipe||1-1/2″x11-1/4″||One and One-half inches by Eleven and One Quarter Inches|
|3 x 6 Ipe||2.5″ x 5.5″ Ipe||2-1/2″x5-1/2″||Two and One-half Inches by Five and One-Half Inches|
|3 x 8 Ipe||2.5″ x 7.25″ Ipe||2-1/2″x7-1/4″||Two and One-half Inches by Seven and One-Quarter Inches|
|4 x 4 Ipe||3.5” x 3.5″ Ipe||3-1/2″x3-1/2″||Three and One-half Inch by Three and One-Half Inches|
|4×6 Ipe||3.5″ x 5.5″ Ipe||3-1/2″x5-1/2″||Three and One-Half Inch by Five and One-Half Inches|
|4×8 Ipe||3.5″ x 7.25″ Ipe||3-1/2″x7-1/4″||Three and One-half Inch by Seven and One-Quarter Inches|
|4×10 Ipe||3.5″ x 9.25″ Ipe||3-1/2″x9.25″||Three and One-half inches by Nine and One-Quarter Inches|
|4×12 Ipe||3.5″ x 11.25″ Ipe||3-1/2″x11.25″||Three and One-half inches by Eleven and One-Quarter Inches|
|6×6 Ipe||5.5″ x 5.5″ Ipe||5-1/2″x5-1/2″||Five and One-Quarter Inches by Five and One-Half Inches|
|6×8 Ipe||5.5″ x 7.25″ Ipe||5-1/2″x7-1/4″||Five and One-Quarter Inches by Seven and One-Quarter Inches|
|6×10 Ipe||5.5″ x 9.25″ Ipe||5-1/2″x9-1/4″||Five and One-Quarter Inches by Nine and One-Quarter Inches|
|6×12 Ipe||5.5″ x 11.25″ Ipe||5-1/2″x11-1/4″||Five and One-Quarter Inches by Eleven and One-Quarter Inches|
|8×8 Ipe||7.25″x7.25″ Ipe||7-1/4″x7-1/4″||Seven and one-Quarter Inches by Seven and one-Quarter Inches|
|2×2 Ipe Tiles||24″x24″*||2’x2′||Two by Two Feet|
|2×4 Ipe Tiles||24″ x 48 “*||2’x4′||Two by Four Feet|
Please Note: We have full milling capabilities and can reduce any of these sizes to any specific needs your job may require.
*This page is meant to be a resource for sizing. For the exact sizing of your order please refer to your specific order and if you have any questions make sure to ask prior to ordering.
**Moisture can add or reduce these actual measurements by as much as 6%.