A delicate and poignant waltz from Tchaikovsky's 18 Pieces, Op. 72. It is characterized by its intimate, salon-style charm and a bittersweet melodic contour typical of the composer's smaller piano works.
Developing a graceful, unhurried rubato that avoids sentimentality is key to an effective performance.
Comparable difficulty and character — good candidates for what to learn next.
Valse sentimentale, No. 6 is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Valse sentimentale, No. 6 lasts about 2 minutes.
Valse sentimentale, No. 6 is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include At Bedtime, TH 70 by Pyotr Tchaikovsky, Allegro vivo, TH 165 by Pyotr Tchaikovsky, Allegro vivo in C minor by Pyotr Tchaikovsky — see the full similar-pieces list on this page.