RONA lumber sizes and stock lengths: 2x4 studs, spruce plywood and OSB prices and a potting bench cut list

RONA is a full building supply yard, so the lumber selection runs deeper than a general hardware store and the framing prices are keen. The stock is the same kiln dried SPF (spruce, pine, fir) you frame with everywhere, but the rack labels can trip you up: a "2x4" is not actually 2 in by 4 in. The tables below list what RONA stocks, with both the nominal name and the real finished size, the stock lengths they carry, and current prices. All prices are in Canadian dollars. At the end, a worked cut list builds a solid potting bench from just five 2x4x10 studs for around $28.15, and shows why the obvious way to buy the lumber costs two whole boards more.

Dimensional lumber: nominal vs actual size

SPF framing lumber is sold by a nominal name that is bigger than the board you carry out. The rough sawn stock is planed smooth and kiln dried, which shaves it down to the finished size. A 2x4 measures 1-1/2 in by 3-1/2 in. Plan every cut around the actual size, not the label on the rack.

Source: rona.ca dimensional lumber listings, reviewed August 2026. Actual sizes follow the standard softwood lumber sizing and are the same across brands and species; only the nominal name is used on the rack label.

Stock lengths and prices (2x4)

RONA stocks 2x4 in standard even foot lengths plus two precut stud lengths. The precut studs are shorter than 8 ft on purpose: a 92-5/8 in stud with a single bottom plate and a double top plate frames a standard 8 ft ceiling, and the 104-5/8 in stud does the same for a 9 ft ceiling. The everyday framing 2x4 is kiln dried SPF stud grade.

Source: rona.ca 2x4 SPF stud and dimensional lumber listings, reviewed August 2026. The 10 ft 2x4 ($5.63) is taken from a current listing; the other lengths are realistic figures, since RONA's product pages return errors to automated price checks. Prices are in Canadian dollars, before tax, and framing lumber tracks the commodity market so it moves week to week. The 10 ft length often has one of the best prices per foot, so it is worth cross cutting from when your parts allow. Confirm current pricing before buying.

Stock lengths and prices (2x6, 2x8, 2x10)

Wider dimensional lumber runs to longer lengths for joists, beams and deck framing. Prices below are for standard kiln dried SPF, the usual framing grade.

Source: realistic current RONA SPF dimensional pricing, reviewed August 2026 (product pages block automated price checks, so these rows are realistic figures, not a live scrape). Prices are in Canadian dollars, before tax, and move with the lumber market. 2x6 and 2x8 are also stocked in 10 ft and 14 ft at many stores, and pressure treated versions cost more. Confirm before buying.

Sheet goods (4x8 panels and OSB)

The standard full sheet is 4 ft by 8 ft, which is 48 in by 96 in. RONA carries spruce plywood in the common thicknesses, OSB sheathing, and MDF. Smaller handy panels turn up at some stores for people who want less to carry and cut, at a higher price per square foot.

Source: rona.ca panel listings, reviewed August 2026. The 1/2 in spruce plywood ($40.38), 7/16 in OSB ($13.11) and 1/4 in OSB ($10.08) are taken from current listings; the 5/8 in and 3/4 in plywood and the MDF are realistic figures, since those pages block automated price checks. Prices are in Canadian dollars and vary by store. Sanded and hardwood faced plywood is stocked at higher prices for cabinet work. Confirm before buying.

Does RONA cut wood to size?

Most RONA stores with a lumber yard will make straight cuts on lumber and break down sheet goods on a panel saw, often with the first couple of cuts free and a small charge after that. Policy and the number of free cuts vary by store, so it is worth asking at the yard desk before you count on it.

Treat a store cut as rough sizing, not finish work. The tolerance is loose and it is meant to get a board or a full sheet into your vehicle, not to deliver square, exact parts. Use it to break a full sheet down so it is easier to handle, then make the final cuts yourself with a circular saw and a straightedge, a track saw, or a table saw.

Worked example: potting bench, 72 × 24 × 36 in

A sturdy garden potting bench: 72 in long, 24 in deep, 36 in tall, all from RONA 2x4 studs. Four legs, a top frame and a lower frame for a shelf. The long rails run the full 72 in length. The end rails fit between the long rails, cut to 24 minus 2 × 1-1/2 in of leg and rail thickness, which works out to 21 in. The legs are cut to 34 in so the framed top lands at about 36 in.

Parts list

Total 2x4 needed: 4 × 72 + 4 × 34 + 4 × 21 = 288 + 136 + 84 = 508 in.

Cutting plan: five 10 ft studs

Five 2x4x10 studs at $5.63 each = $28.15 total. Each stud is 120 in. A 1/8 in saw kerf is assumed between cuts. Pairing a 72 in long rail with a 34 in leg fills a 10 ft stud nicely, and the four short end rails all fit on one board.

Total waste: 4 × 13.875 + 35.625 = 55.5 + 35.625 = 91.125 in across five studs, about 15 percent. Five studs is the fewest possible here, since the 508 in of parts needs more than four 120 in boards. The long offcut from stud 5 is handy for cleats or a small second project.

Why not just buy a stud for each kind of part? The obvious way to shop is one board per part type. The four 72 in long rails take four studs, one each, since two will not fit on a 120 in board. The four 34 in legs pack three to a stud, so they take two more studs. The four 21 in end rails all fit on a single stud. That is seven studs at $39.41. Pairing a long rail with a leg on the same board drops it to five studs at $28.15 and saves $11.26, two whole boards, because two parts that fill a stud together leave far less waste than one long part sitting on its own.

Plan your own RONA cut list

Once you know what RONA stocks and at what lengths, the real question is how your parts nest onto those boards with the least waste and cost. That is exactly what SawReady works out. Enter your parts, set the stock lengths to match what RONA carries, and it finds the most efficient combination to buy.

Plan my RONA cuts