Common record diameters are 7, 10 and 12 inches. Common microgroove playback speeds are 33⅓ and 45 RPM. Size does not determine speed; read the label for the particular record.
| Nominal size | Diameter in cm | Before playing |
|---|---|---|
| 7 inches | 17.78 cm | Check speed and centre-hole adapter needs. |
| 10 inches | 25.40 cm | Do not infer speed or programme from size. |
| 12 inches | 30.48 cm | Can be an album, EP or single; read the label. |
LP record size and dimensions
A typical 12-inch LP has a nominal diameter of 30.48 cm. A sleeve is larger than the disc, so leave extra room for the jacket, protective sleeve and any gatefold. These are nominal format measurements, not a guarantee of a particular product’s tolerances.
What are small records called?
A small record may be a 7-inch single or another release format. Small does not mean EP by definition. Identify the title, diameter and speed rather than deciding solely from the size.
What are the big records called?
Many full-size album records are 12-inch LPs, but 12-inch singles exist too. A listing should tell you whether you are buying a full album, a single or a shorter release.
How to set the correct speed
Read the speed printed on the label or packaging and follow the player manual. If your player has an automatic size selector, set that independently where required. Do not change size settings during automatic playback unless the manual permits it.
Older 78 RPM records need a separate check
Older 78s are often shellac and may require a suitable stylus and compatible equipment. Do not treat a family collection of 78s as ordinary LPs or apply a standard vinyl-cleaning method without checking the material.
Keep reading
What Is a Vinyl EP? Meaning, Size & LP Comparison · LP vs Vinyl: What Is an LP Record?
Reference and review
Format, identifier or equipment reference · Reviewed 17 October 2026. Read the instructions for your exact release and equipment.