Description: 【Comprehensive】: Integrates four classic composition guides Golden Ratio, Diagonal, Rule of Thirds, and Golden Triangle into a card for systematic “photography eye” training 【Intuitive】: Transparent cards with printed composition lines allow direct overlay on real scenes for instant observation, comparison, and pre composition practice 【Portable】: Lightweight design with chain lets you attach the cards to keys or bags for easy carrying and spontaneous composition exercises anytime, anywhere 【Versatile】: Ideal for beginners in photography, painting, and sketching; helps users build a solid foundation in visual composition and framing skills across multiple art forms 【Skill Building】: Repeated use fosters intuitive understanding of balance, subject placement, and visual guidance enhancing your ability to compose compelling images naturally   Specification:material : pp Size Chart: 4.5cmx3.06cm/1.77inchx1.20inch Package Includes: 4 View Finders Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.