This study aims to understand the moderating role of firm size on financial
characteristics and Islamic firm value. Then study how the influence of firm size moderation on the
relationship of financial characteristics and corporate governance with firm value. This study uses
secondary data from financial statements and analyzed by the panel data method for six years. The
sample selection is arranged by the purposive sampling method with Islamic index constituent
population. Conclusion: leverage, profitability, and efficiency have a significant positive effect
on Islamic firm value, but the liquidity and audit committee do not affect. Firm size moderators
provide a reinforcing effect for all independent variables so that liquidity and audit committees
have a positive effect on firm value. Implications: Islamic firm investors in the equity market
should consider the crucial variable, namely firm size, in addition to firm and corporate governance
characteristics. These conclusions provide important implications for managers and relevant authorities
to enhance financial market information related to firm value and further attention to corporate
governance mechanisms.