which size would be best as a poster above a desk?

That will depend on the specifics. If you are looking to utilize this chart as reference in a bedroom environment, then going with either the 15 x 20 or 18 x 24 option is a good choice depending on the wall space available. If this is for a classroom environment then maybe going with the larger 24 x30 chart is the better option.

Are the semimetals featured as being blue or black? (Just asking cause the pictures show two different things)

The Semimetals are blue as in the primary image. The Images showing black must be a faulty render output. Thanks for bringing this to our attention.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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周期表サイエンスポスター大型ラミネート加工新しい2023年チャート教材ブラック教室装飾プレミアム教育者原子番号ガイド 18x24

Product ID: 725123459

🎨Color-coded element groups

💧Water & tear resistant

🛡️3 mil laminated durability

NT$2692

Duties & taxes included

In stock

Sold byAmazon TaiwanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧪 Unlock the elements of success with every glance!

VERSATILE SIZE OPTIONS - Available in multiple sizes (15x20, 18x24, 24x30) to fit any learning space.
EFFORTLESS WALL DISPLAY - Lightweight, unframed poster mounts easily to transform any room into a science hub.
TEACHER APPROVED DESIGN - Crafted with educators in mind for clear, easy-to-read atomic number guides.
CLASSROOM READY DURABILITY - Premium 3 mil lamination shields against spills and tears for lasting use.
VISUAL LEARNING POWERHOUSE - Vibrant, color-coded elements simplify complex chemistry at a glance.

This 18x24 laminated periodic table poster by Young N Refined features a durable 3 mil plastic finish that resists water and tears, making it perfect for classrooms and home study. Its color-coded design enhances element group recognition, supporting educators and students alike in mastering chemistry fundamentals with clarity and style.

Specifications

ASIN	B07BDHW1F3
Age Range Description	Kid
Amazon Bestseller	#246,517 in Office Products ( See Top 100 in Office Products ) #113 in Class Records & Lesson Books
Brand Name	Young N Refined
Color	multicolor
Color Family	Black
Cover Material	Plastic
Customer Package Type	Standard Shipping Envelopes or Boxes
Customer Reviews	4.6 4.6 out of 5 stars (1,163)
Finish Type	Plastic
Frame Material	Plastic
Frame Type	Unframed
Indoor Outdoor Usage	Indoor
Is Original Artwork	No
Item Dimensions L x W	1L x 457W mm
Item Shape	Rectangular
Manufacturer	Young N Refined
Material	Laminated
Mounting Type	Wall Mount
Number Of Panels	No
Number of Items	1
Orientation	Landscape
Paint Type	Watercolor
Paper Finish	Matte
Pattern	Solid
Product Style	Basic
Recommended Uses For Product	Educational purpose, home/classroom decor
Room Type	Classroom
Seasons	All, Fall
Size	長さ0.1 cm x 幅45.7 cm
Special Features	Durable, water and tear resistant laminate design
Subject Character	Periodic Table
Theme	Education, Digital, Science
UPC	689559055718
Unit Count	1 Count
Wall Art Form	Poster

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