@syncfusion/react-inputs/styles/numeric-textbox/material.css

Syncfusion React Input package is a feature-rich collection of UI components, including Textbox, Textarea, Numeric-textbox and Form, designed to capture user input in React applications.

.sf-numeric.sf-input-group .sf-spin-icon svg {
  font-size: var(--sf-font-size-base);
}
.sf-numeric.sf-input-group.sf-medium .sf-spin-icon svg, .sf-numeric.sf-input-group.sf-large .sf-spin-icon svg {
  font-size: var(--sf-font-size-xl);
}