LEGO part 73878: Window Round 3 x 3 x 2
Specifications
| Reference | 73878 |
|---|---|
| Category | Windows and Doors |
| Material | ABS plastic |
| Colours | 13 |
| Sets | 34 |
| Listed pieces | 245 |
| First appearance | 2021 |
| Latest appearance | 2026 |
| Element (Reddish Brown) | 6343651 |
LEGO part 73878, Window Round 3 x 3 x 2, belongs to the Windows and Doors category. It exists in 13 colours and appears in 34 sets of our database, from 2021 to 2026, for a total of 245 listed pieces. Its most common colour is Reddish Brown.
Number 73878 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in reddish brown, it is 6343651.
Part 73878 through the years
The oldest set in our database that contains part 73878 is 76389 Hogwarts Chamber Of Secrets, released in 2021 in the Harry Potter theme. It is still in use: the most recent set featuring it, 76476 The Ministry of Magic : Collectors' Edition, dates from 2026.
Its peak year is 2025, with 13 sets containing it. The set with the most copies is 76476 The Ministry of Magic : Collectors' Edition: 36 copies, against an average of 7.2 per set.
It is spread across several themes, led by Friends (24%), Harry Potter (18%) and Modular Buildings (9%). With 34 sets, it ranks no. 2,049 of 2,731 parts in our database and no. 56 of 76 in the Windows and Doors category.
Sets containing part 73878, by period
| Period | Sets | |
|---|---|---|
| 2021 | 5 | |
| 2022 | 4 | |
| 2023 | 4 | |
| 2024 | 4 | |
| 2025 | 13 | |
| 2026 | 4 |
Colours of part 73878
9 colours appear in only one set: orange (76422 Diagon Alley Weasleys' Wizard Wheezes), sand green (76457 Hogsmeade Village : Collectors' Edition), sand blue (80036 The City of Lanterns), light bluish gray (75447 The Razor Crest), medium lavender (76439 Ollivanders & Madam Malkin’s Robes), …
| Colour (element ID) | Sets | Pieces | Example sets |
|---|---|---|---|
| Reddish Brown6343651 | 13 | 38 | 763893112010297 |
| White6639376 · 6398113 | 7 | 74 | 414494170441447 |
| Black6473450 | 7 | 55 | 764711035076300 |
| Bright Pink6526038 | 2 | 14 | 4267040809 |
| Orange6433886 | 1 | 30 | 76422 |
| Sand Green6560252 | 1 | 8 | 76457 |
| Sand Blue6377674 | 1 | 6 | 80036 |
| Light Bluish Gray6584326 | 1 | 6 | 75447 |
| Medium Lavender6489196 | 1 | 4 | 76439 |
| Yellow6523878 | 1 | 4 | 42646 |
| Dark Blue6446122 | 1 | 2 | 71799 |
| Bright Green6550797 | 1 | 2 | 42671 |
| Light Nougat6621351 | 1 | 2 | 43297 |
Where to buy part 73878
Setopedia shows no prices: they vary by colour, condition and seller. Amazon links are affiliate links.
Sets that include part 73878
Sets ranked by popularity that include at least one part 73878, in any colour.
76389Hogwarts Chamber Of Secrets2021 · 1,171 piecesView the set
31120Medieval Castle2021 · 1,426 piecesView the set
3D10297Boutique Hotel2022 · 3,068 piecesView the set
71799NINJAGO City Markets2023 · 6,163 piecesView the set
10333The Lord of the Rings: Barad-dûr2024 · 5,478 piecesView the set
21330Home Alone2021 · 3,955 piecesView the set
41449 Andrea's Family House2021 · 802 pieces
80036 The City of Lanterns2022 · 2,187 pieces
41704 Main Street Building2022 · 1,682 pieces
41447 Heartlake City Park2021 · 432 pieces
76476 The Ministry of Magic : Collectors' Edition2026 · 3,545 pieces
75447 The Razor Crest2026 · 930 pieces
76471 Knockturn Alley Wizarding Shops2026 · 788 pieces
43297 Rapunzel's Castle2026 · 676 pieces
75640 The Baratie Floating Restaurant2025 · 3,398 pieces
10350 Tudor Corner2025 · 3,266 pieces
76457 Hogsmeade Village : Collectors' Edition2025 · 3,228 pieces
76300 Arkham Asylum2025 · 2,953 pieces
910040 Harbormaster's Office2025 · 2,419 pieces
42670 Heartlake City Apartments and Stores2025 · 2,040 pieces
31168 Medieval Horse Knight Castle2025 · 1,371 pieces
10351 Sherlock Holmes: Book Nook2025 · 1,359 pieces
42671 Plant Café & Flower Shop2025 · 1,138 pieces
40809 Festive Gingerbread House2025 · 498 pieces
76784 Black Dahlia Flower2025 · 358 pieces
42648 Panda Sanctuary Animal Care2025 · 243 pieces
42646 Autumn’s Room2025 · 222 pieces
76439 Ollivanders & Madam Malkin’s Robes2024 · 766 pieces
71477 The Sandman's Tower2024 · 723 pieces
43241 Rapunzel's Tower and the Snuggly Duckling Tavern2024 · 623 pieces
10326 Natural History Museum2023 · 4,015 pieces
71461 Fantastical Tree House2023 · 1,257 pieces
76422 Diagon Alley Weasleys' Wizard Wheezes2023 · 835 pieces
41711 Emma's Art School2022 · 844 pieces
Related parts
Glass for Window 1 x 2 x 2 Flat60601 · Paired part
Window Pane Latticed 1 x 2 x 238320 · Paired partMore parts in the Windows and Doors category
42509 Glass for Frame 1 x 6 x 638 sets
30179 Door Frame 1 x 4 x 6 Type 137 sets
30045 Window 1 x 2 x 2 & 2/3 Pane Twisted Bar with Rounded Top36 sets
92263 Door 1 x 3 x 2 Right - Open Between Top and Bottom Hinge34 sets
60800a Window 1 x 2 x 3 Shutter with Hinges and Handle33 sets
4133 Window 2 x 4 x 3 Pane30 sets
4219 Garage Roller Door Section with Handle29 sets
4033 Window 1 x 4 x 3 Train with All Studs Hollow28 sets
Frequently asked questions
How many LEGO sets include part 73878?
Part 73878 (Window Round 3 x 3 x 2) appears in 34 sets listed on Setopedia, from 2021 to 2026, in any colour.
Which LEGO set contains the most copies of part 73878?
Set 76476 The Ministry of Magic : Collectors' Edition, released in 2026, contains 36 copies, the highest count in our database. On average, a set containing part 73878 has 7.2.
Which colours does LEGO part 73878 come in?
13 colours are listed for part 73878. The most common is Reddish Brown, found in 13 sets.
What is the rarest colour of part 73878?
According to our inventories, it is dark blue, found in only 1 set (71799 NINJAGO City Markets).
What is the element ID of part 73878 in reddish brown?
In reddish brown, part 73878 has element ID 6343651. Number 73878 is the mould number, the same for every colour.
Is LEGO part 73878 still used in recent sets?
Yes: it appears in sets released in 2026, such as 76476 The Ministry of Magic : Collectors' Edition.
Where can I buy LEGO part 73878 individually?
Single parts 73878 can be ordered on Pick a Brick (lego.com) in colours currently produced, or on BrickLink for older colours. The part is also included in the sets listed on this page.