How deep is the Casio PX-S1100, and why does depth matter?

The Casio PX-S1100 is 9.1 inches (232 mm) deep — the slimmest 88-key weighted digital piano ever made. Depth matters in small spaces because most furniture is designed around 10–12 inch depth standards. A piano that is 9.1 inches deep can sit flush against a wall on a standard desktop or narrow console table without protruding into the room.

Does a slimmer piano mean a worse key action?

Not necessarily, but there is an engineering trade-off. To achieve the PX-S1100's depth, Casio shortened the key pivot point, which means the keys feel slightly different near the fallboard. For the vast majority of players — pop, jazz, and casual learners — this is imperceptible. Classical students training on complex repertoire may eventually notice the shorter throw compared to a Kawai or Roland action.

Is the Yamaha P-225 noticeably deeper than the Casio PX-S1100?

The P-225 is 10.7 inches deep versus the Casio's 9.1 inches — a 1.6-inch difference. In practice, this means the P-225 slightly overhangs a standard desk or table. The P-225's GHC action benefits from this extra depth, delivering a more piano-like pivot feel. Whether the action difference is worth the extra depth depends on how often you play complex piano repertoire.

Can I fit an 88-key digital piano in a studio apartment?

Yes, with planning. The slimmest options (Casio PX-S1100, Yamaha P-225) can sit on a narrow console table or a purpose-built keyboard stand against a wall, taking up no more floor space than a narrow bookshelf. The key dimension to plan for is width: all 88-key instruments are approximately 52–54 inches wide. The depth (front-to-back) is where slim designs make a meaningful difference.

The Slimmest 88Key Digital Pianos for Small Apartments (2026)

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The Slimmest 88Key Digital Pianos for Small Apartments (2026) | SynthSquid