Based on recent analyses and reports, here are some small to mid-cap Thai stocks that have demonstrated profitability, attractive valuations, and commendable dividend yields:

AP (Thailand) Public Company Limited (AP)
A real estate developer specializing in single-family homes, townhouses, and condominiums. As of early 2025, AP had a price-to-earnings (P/E) ratio of 5.38 and a price-to-book (P/B) ratio of 0.62, with a dividend yield of approximately 7.79%. (en.moneyandbanking.co.th)

Tisco Financial Group Public Company Limited (TISCO)
A financial services company focusing on hire purchase loans. In early 2025, TISCO reported a P/E ratio of 11.31 and a P/B ratio of 1.81, offering a dividend yield of about 7.81%. (en.moneyandbanking.co.th)

SC Asset Corporation Public Company Limited (SC)
Engaged in real estate development, particularly housing and condominium projects. As of early 2025, SC had a P/E ratio of 5.02 and a P/B ratio of 0.58, with a dividend yield of approximately 8.95%. (en.moneyandbanking.co.th)

Sansiri Public Company Limited (SIRI)
A real estate developer focusing on condominiums and single-family homes. In early 2025, SIRI reported a P/E ratio of 4.86 and a P/B ratio of 0.51, offering a dividend yield of about 10.23%. (en.moneyandbanking.co.th)

Univanich Palm Oil Public Company Limited (UVAN)
Operates in oil palm plantations and related businesses. As of January 2025, UVAN had a dividend yield of 8%, with a payout ratio of 59.1%. (simplywall.st)

These companies have shown strong financial performance and offer attractive dividend yields, making them noteworthy considerations for investors seeking profitable small to mid-cap Thai stocks with good valuations and yields.