His technique combines the precision of the Netherlandish tradition with the emerging Mannerist style. Unlike his predecessors, Eworth frequently included allegorical symbols and complex inscriptions within his portraits to convey the status or virtues of his subjects. This is evident in works such as Sinte Aelwaer, which reflects his origins in the Southern Netherlands. He used a distinctive monogram consisting of the letters H and E joined together. His work is characterised by a meticulous attention to the textures of fabrics and jewellery, which he rendered with a flat, graphic quality.

For collectors today, Eworth provides a window into the fashion and social hierarchies of the Tudor era. His portraits are valued for their clarity and the way they record the material culture of the sixteenth century. The stiff, formal poses of his subjects create a sense of stillness that fits well in modern interiors. His work offers a direct connection to the history of the Northern Renaissance while maintaining a decorative appeal through its use of pattern and bold silhouettes.